diff --git a/src/auth.c b/src/auth.c
index 2c89c65..874bc34 100644
--- a/src/auth.c
+++ b/src/auth.c
@@ -654,7 +654,7 @@ int cacheauth(struct clientparam * param){
 			
 		}
 		if(((!(conf.authcachetype&2)) || (param->username && ac->username && !strcmp(ac->username, (char *)param->username))) &&
-		   ((!(conf.authcachetype&1)) || (*SAFAMILY(&ac->sa) ==  *SAFAMILY(&param->sincr) && !memcmp(SAADDR(&ac->sa), &param->sincr, SAADDRLEN(&ac->sa)))) && 
+		   ((!(conf.authcachetype&1)) || (*SAFAMILY(&ac->sa) ==  *SAFAMILY(&param->sincr) && !memcmp(SAADDR(&ac->sa), SAADDR(&param->sincr), SAADDRLEN(&ac->sa)))) && 
 		   (!(conf.authcachetype&4) || (ac->password && param->password && !strcmp(ac->password, (char *)param->password)))) {
 			if(param->username){
 				myfree(param->username);
@@ -688,7 +688,7 @@ int doauth(struct clientparam * param){
 				pthread_mutex_lock(&hash_mutex);
 				for(ac = authc; ac; ac = ac->next){
 					if((!(conf.authcachetype&2) || !strcmp(ac->username, (char *)param->username)) &&
-					   (!(conf.authcachetype&1) || (*SAFAMILY(&ac->sa) ==  *SAFAMILY(&param->sincr) && !memcmp(SAADDR(&ac->sa), &param->sincr, SAADDRLEN(&ac->sa))))  &&
+					   (!(conf.authcachetype&1) || (*SAFAMILY(&ac->sa) ==  *SAFAMILY(&param->sincr) && !memcmp(SAADDR(&ac->sa), SAADDR(&param->sincr), SAADDRLEN(&ac->sa))))  &&
 					   (!(conf.authcachetype&4) || (ac->password && !strcmp(ac->password, (char *)param->password)))) {
 						ac->expires = conf.time + conf.authcachetime;
 						if(strcmp(ac->username, (char *)param->username)){
@@ -709,7 +709,7 @@ int doauth(struct clientparam * param){
 					ac = myalloc(sizeof(struct authcache));
 					if(ac){
 						ac->expires = conf.time + conf.authcachetime;
-						ac->username = mystrdup((char *)param->username);
+						ac->username = param->username?mystrdup((char *)param->username):NULL;
 						ac->sa = param->sincr;
 						ac->password = NULL;
 						if((conf.authcachetype&4) && param->password) ac->password = mystrdup((char *)param->password);