diff --git a/src/httpsrv.c b/src/httpsrv.c
index 559536c..3b135ba 100644
--- a/src/httpsrv.c
+++ b/src/httpsrv.c
@@ -17,6 +17,7 @@
 */
 
 #include "proxy.h"
+#include <limits.h>
 
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -1022,13 +1023,8 @@ static int op_data(struct httpreq *r, const unsigned char *params)
 
 		httpsrv_fill(buf, len, sent);
 
-		if(delay > 0){
-#ifdef _WIN32
-			usleep(delay);
-#else
-			usleep(delay * 1000);
-#endif
-		}
+		if(delay > 0) sockpoll(&r->param->srv->so, r->param->sostate, NULL, 0,
+			(delay > INT_MAX)? INT_MAX : (int)delay);
 
 		if(chunked){
 			if(httpchunk(r->param, buf, len)) return 1;
diff --git a/src/proxy.c b/src/proxy.c
index 8f8ef71..257485e 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -1466,7 +1466,7 @@ for(;;){
 	if(st1 > sleeptime) sleeptime = st1;
 	if(sleeptime > 0){
 /*		if(sleeptime > 30) sleeptime = 30; */
-		usleep(sleeptime * SLEEPTIME);
+		sockpoll(&param->srv->so, param->sostate, NULL, 0, sleeptime);
 	}
  }
  buf[inbuf] = 0;