diff --git a/Makefile.msvc b/Makefile.msvc
index 7fedec3..41e771c 100644
--- a/Makefile.msvc
+++ b/Makefile.msvc
@@ -8,7 +8,7 @@
 
 BUILDDIR = ../bin/
 CC = cl
-CFLAGS = /nologo /MT /W3 /Ox /GS /EHs- /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_WSAPOLL" /D "NDEBUG" /D "WIN32" /D "WITH_SSL" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRINTF_INT64_MODIFIER=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
+CFLAGS = /nologo /MT /W3 /Ox /GS /EHs- /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_WSAPOLL" /D "NDEBUG" /D "WIN32" /D "WITH_SSL" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRIu64=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
 COUT = /Fo
 LN = link
 LDFLAGS =  /nologo /subsystem:console /incremental:no /machine:I386
diff --git a/Makefile.msvc64 b/Makefile.msvc64
index 1d0ed0e..d67443c 100644
--- a/Makefile.msvc64
+++ b/Makefile.msvc64
@@ -8,7 +8,7 @@
 
 BUILDDIR = ../bin64/
 CC = cl
-CFLAGS = /nologo /MT /W3 /Ox /EHs- /GS /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_SSL" /D "WITH_WSAPOLL" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRINTF_INT64_MODIFIER=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
+CFLAGS = /nologo /MT /W3 /Ox /EHs- /GS /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_SSL" /D "WITH_WSAPOLL" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRIu64=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
 COUT = /Fo
 LN = link
 LDFLAGS = /nologo /subsystem:console /incremental:no /machine:x64
diff --git a/Makefile.msvcARM64 b/Makefile.msvcARM64
index 43c559f..2b51c6a 100644
--- a/Makefile.msvcARM64
+++ b/Makefile.msvcARM64
@@ -8,7 +8,7 @@
 
 BUILDDIR = ../bin64/
 CC = cl
-CFLAGS = /nologo /MT /W3 /Ox /EHs- /GS /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_WSAPOLL" /D "WITH_SSL" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRINTF_INT64_MODIFIER=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
+CFLAGS = /nologo /MT /W3 /Ox /EHs- /GS /GA /GF /D "MSVC" /D "WITH_STD_MALLOC" /D "WITH_WSAPOLL" /D "WITH_SSL" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRIu64=\"I64\"" /Fp"proxy.pch" /FD /c $(VERSION) $(BUILDDATE)
 COUT = /Fo
 LN = link
 LDFLAGS = /nologo /subsystem:console /incremental:no /machine:arm64
diff --git a/Makefile.msvcCE b/Makefile.msvcCE
index bbff3fa..339e5e9 100644
--- a/Makefile.msvcCE
+++ b/Makefile.msvcCE
@@ -8,7 +8,7 @@
 
 BUILDDIR = ../bin/
 CC = cl
-CFLAGS = /DARM /D "NOODBC" /nologo /MT /W3 /Wp64 /Ox /GS /EHs- /GA /GF /D "MSVC" /D "_WINCE" /D "WITH_STD_MALLOC" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRINTF_INT64_MODIFIER=\"I64\"" /Fp"proxy.pch" /FD /c
+CFLAGS = /DARM /D "NOODBC" /nologo /MT /W3 /Wp64 /Ox /GS /EHs- /GA /GF /D "MSVC" /D "_WINCE" /D "WITH_STD_MALLOC" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRIu64=\"I64\"" /Fp"proxy.pch" /FD /c
 COUT = /Fo
 LN = link
 LDFLAGS = /nologo /subsystem:console /incremental:no
@@ -32,4 +32,4 @@ include Makefile.inc
 
 allplugins:
 	for /D %%i in ($(PLUGINS)) do (copy Makefile plugins\%%i && copy Makefile.var plugins\%%i && cd plugins\%%i && nmake && del *.obj *.idb &&cd ..\..)
-	
\ No newline at end of file
+	
diff --git a/Makefile.watcom b/Makefile.watcom
index 4eab735..df909a9 100644
--- a/Makefile.watcom
+++ b/Makefile.watcom
@@ -8,7 +8,7 @@
 
 BUILDDIR = ../bin/
 CC = cl
-CFLAGS = /nologo /Ox /MT /D "NOIPV6" /D "NODEBUG" /D "NOODBC" /D "NORADIUS" /D"WATCOM" /D "MSVC" /D "WITH_STD_MALLOC" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRINTF_INT64_MODIFIER=\"I64\"" /c $(VERSION) $(BUILDDATE)
+CFLAGS = /nologo /Ox /MT /D "NOIPV6" /D "NODEBUG" /D "NOODBC" /D "NORADIUS" /D"WATCOM" /D "MSVC" /D "WITH_STD_MALLOC" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "_WIN32" /D "PRIu64=\"I64\"" /c $(VERSION) $(BUILDDATE)
 COUT = /Fo
 LN = link
 LDFLAGS = /nologo /subsystem:console /incremental:no 
diff --git a/src/3proxy.c b/src/3proxy.c
index 9082f50..c83b372 100644
--- a/src/3proxy.c
+++ b/src/3proxy.c
@@ -209,7 +209,7 @@ void dumpcounters(struct trafcount *tlin, int counterd){
 		if(cfp){
 			for(tl = tlin; cfp && tl; tl = tl->next){
 				if(tl->type >= conf.countertype)
-					fprintf(cfp, "%05d %020"PRINTF_INT64_MODIFIER"u%s%s\n", tl->number, tl->traf64, tl->comment?" #" : "", tl->comment? tl->comment : "");
+                    fprintf(cfp, "%05d %020"PRIu64"u%s%s\n", tl->number, tl->traf64, tl->comment?" #" : "", tl->comment? tl->comment : "");
 			}
 			fclose(cfp);
 		}
diff --git a/src/datatypes.c b/src/datatypes.c
index 0d991c6..2fb167d 100644
--- a/src/datatypes.c
+++ b/src/datatypes.c
@@ -9,7 +9,7 @@
 
 static void pr_unsigned64(struct node *node, CBFUNC cbf, void*cb){
 	char buf[32];
-	if(node->value)(*cbf)(cb, buf, sprintf(buf, "%"PRINTF_INT64_MODIFIER"u", *(uint64_t *)node->value));
+	if(node->value)(*cbf)(cb, buf, sprintf(buf, "%"PRIu64"u", *(uint64_t *)node->value));
 }
 
 static void pr_integer(struct node *node, CBFUNC cbf, void*cb){
diff --git a/src/log.c b/src/log.c
index abeea86..02e66b1 100644
--- a/src/log.c
+++ b/src/log.c
@@ -246,15 +246,15 @@ int dobuf2(struct clientparam * param, unsigned char * buf, const unsigned char
 				 i += (int)strlen((char *)buf+i);
 				 break;
 				case 'L':
-				 sprintf((char *)buf+i, "%"PRINTF_INT64_MODIFIER"u", param->cycles);
+				 sprintf((char *)buf+i, "%"PRIu64"u", param->cycles);
 				 i += (int)strlen((char *)buf+i);
 				 break;
 				case 'I':
-				 sprintf((char *)buf+i, "%"PRINTF_INT64_MODIFIER"u", param->statssrv64);
+				 sprintf((char *)buf+i, "%"PRIu64"u", param->statssrv64);
 				 i += (int)strlen((char *)buf+i);
 				 break;
 				case 'O':
-				 sprintf((char *)buf+i, "%"PRINTF_INT64_MODIFIER"u", param->statscli64);
+				 sprintf((char *)buf+i, "%"PRIu64"u", param->statscli64);
 				 i += (int)strlen((char *)buf+i);
 				 break;
 				case 'h':
diff --git a/src/plugins/LdapPlugin/ldapauth.c b/src/plugins/LdapPlugin/ldapauth.c
index 1572b4d..dbff3ad 100644
--- a/src/plugins/LdapPlugin/ldapauth.c
+++ b/src/plugins/LdapPlugin/ldapauth.c
@@ -72,7 +72,7 @@ int savecounters(void)
       sprintf(tmpbuf,pat_file,ldap_dircount,tcd->ace->users->user);
       f=fopen(tmpbuf,"w+b");
       fseek(f,0,SEEK_SET);
-      fprintf(f,"%"PRINTF_INT64_MODIFIER"u %lu %lu\n",tcd->traf64,
+      fprintf(f,"%"PRIu64"u %lu %lu\n",tcd->traf64,
 					(unsigned long)tcd->cleared,(unsigned long)tcd->updated);
 
       fclose(f);
@@ -387,7 +387,7 @@ int h_trafgroup(int argc, unsigned char ** argv)
 		
                fseek(f,0,SEEK_SET);
                fgets(buf, 256, f); 
-  	       sscanf(buf,"%"PRINTF_INT64_MODIFIER"u %lu %lu\n",&rcounter.traf64, 
+  	       sscanf(buf,"%"PRIu64"u %lu %lu\n",&rcounter.traf64, 
 				&rcounter.cleared, &rcounter.updated);
 
 
diff --git a/src/plugins/TrafficPlugin/TrafficPlugin.c b/src/plugins/TrafficPlugin/TrafficPlugin.c
index 5cf23aa..16cfbcb 100644
--- a/src/plugins/TrafficPlugin/TrafficPlugin.c
+++ b/src/plugins/TrafficPlugin/TrafficPlugin.c
@@ -240,7 +240,7 @@ void mylogfunc(struct clientparam * param, const unsigned char * pz) {
 				}
 				if (DBGLEVEL == 1) {
 #ifndef NOPSTDINT
-					fprintf(stdout, "Port=%hd; Before: srv=%"PRINTF_INT64_MODIFIER"d, cli=%"PRINTF_INT64_MODIFIER"d; After:  srv=%"PRINTF_INT64_MODIFIER"d, cli=%"PRINTF_INT64_MODIFIER"d; nreads=%ld; nwrites=%ld; Rule=%d\n",myhtons(*SAPORT(&param->sinsr)), statssrv_before, statscli_before, param->statssrv64, param->statscli64,param->nreads,param->nwrites,rule);
+					fprintf(stdout, "Port=%hd; Before: srv=%"PRIu64"d, cli=%"PRIu64"d; After:  srv=%"PRIu64"d, cli=%"PRIu64"d; nreads=%ld; nwrites=%ld; Rule=%d\n",myhtons(*SAPORT(&param->sinsr)), statssrv_before, statscli_before, param->statssrv64, param->statscli64,param->nreads,param->nwrites,rule);
 #else
 					fprintf(stdout, "Port=%hd; Before: srv=%lu, cli=%lu; After:  srv=%lu, cli=%lu; nreads=%ld; nwrites=%ld; Rule=%d\n",myhtons(param->sins.sin_port), statssrv_before, statscli_before, param->statssrv, param->statscli,param->nreads,param->nwrites,rule);
 #endif
diff --git a/src/proxy.c b/src/proxy.c
index 881ef1e..f7bb56c 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -393,7 +393,7 @@ for(;;){
 				while( (i = sockgetlinebuf(param, CLIENT, buf, BUFSIZE - 1, '\n', conf.timeouts[STRING_S])) > 2){
 					if(i> 15 && (!strncasecmp((char *)(buf), "content-length", 14))){
 						buf[i]=0;
-						sscanf((char *)buf + 15, "%"PRINTF_INT64_MODIFIER"u", &contentlength64);
+						sscanf((char *)buf + 15, "%"PRIu64"u", &contentlength64);
 					}
 				}
 				while( contentlength64 > 0 && (i = sockgetlinebuf(param, CLIENT, buf, (BUFSIZE < contentlength64)? BUFSIZE - 1:(int)contentlength64, '\n', conf.timeouts[STRING_S])) > 0){
@@ -503,7 +503,7 @@ for(;;){
 		if(!sb)continue;
 		++sb;
 		while(isspace(*sb))sb++;
-		sscanf((char *)sb, "%"PRINTF_INT64_MODIFIER"u",&contentlength64);
+		sscanf((char *)sb, "%"PRIu64"u",&contentlength64);
 		if(param->maxtrafout64 && (param->maxtrafout64 < param->statscli64 || contentlength64 > param->maxtrafout64 - param->statscli64)){
 			RETURN(10);
 		}
@@ -581,7 +581,7 @@ for(;;){
 	contentlength64 = param->cliinbuf;
 	param->nolongdatfilter = 1;
   }
-  sprintf((char*)buf+strlen((char *)buf), "Content-Length: %"PRINTF_INT64_MODIFIER"u\r\n", contentlength64);
+  sprintf((char*)buf+strlen((char *)buf), "Content-Length: %"PRIu64"u\r\n", contentlength64);
  }
 
 #endif
@@ -955,7 +955,7 @@ for(;;){
 		if(!sb)continue;
 		++sb;
 		while(isspace(*sb))sb++;
-		sscanf((char *)sb, "%"PRINTF_INT64_MODIFIER"u", &contentlength64);
+		sscanf((char *)sb, "%"PRIu64"u", &contentlength64);
 		hascontent = 1;
 		if(param->unsafefilter && param->ndatfilterssrv > 0) {
 			hascontent = 2;
@@ -1033,7 +1033,7 @@ for(;;){
 	}
 	if(action != PASS) RETURN(517);
 	contentlength64 = param->srvinbuf;
-	sprintf((char*)buf+strlen((char *)buf), "Content-Length: %"PRINTF_INT64_MODIFIER"u\r\n", contentlength64);
+	sprintf((char*)buf+strlen((char *)buf), "Content-Length: %"PRIu64"u\r\n", contentlength64);
 	hascontent = 1;
   }
  }
@@ -1080,7 +1080,7 @@ for(;;){
 			}
 			smallbuf[i] = 0;
 			contentlength64 = 0;
-			sscanf((char *)smallbuf, "%"PRINTF_INT64_MODIFIER"x", &contentlength64);
+			sscanf((char *)smallbuf, "%"PRIu64"x", &contentlength64);
 			if(contentlength64 == 0) {
 				param->chunked = 2;
 			}
diff --git a/src/structures.h b/src/structures.h
index 8d41374..d41e8a8 100644
--- a/src/structures.h
+++ b/src/structures.h
@@ -15,8 +15,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <stdint.h>
-#ifndef PRINTF_INT64_MODIFIER
-#define PRINTF_INT64_MODIFIER "ll"
+#include <inttypes.h>
+#ifndef PRIu64
+#define PRIu64 "ll"
 #endif
 #ifdef  __cplusplus
 extern "C" {
diff --git a/src/webadmin.c b/src/webadmin.c
index 0aefc38..4f5a567 100644
--- a/src/webadmin.c
+++ b/src/webadmin.c
@@ -510,9 +510,9 @@ void * adminchild(struct clientparam* param) {
 			 }
 			 else {
 			  inbuf += sprintf(buf+inbuf,	
-					"</td><td>%"PRINTF_INT64_MODIFIER"u</td>"
+					"</td><td>%"PRIu64"u</td>"
 					"<td>MB%s</td>"
-					"<td>%"PRINTF_INT64_MODIFIER"u.%"PRINTF_INT64_MODIFIER"u</td>"
+					"<td>%"PRIu64"u.%"PRIu64"u</td>"
 					"<td>%s</td>",
 				 cp->traflim64 / (1024 * 1024),
 				 rotations[cp->type],