diff --git a/evutil.c b/evutil.c
index c28caded..5690d497 100644
--- a/evutil.c
+++ b/evutil.c
@@ -1918,15 +1918,15 @@ evutil_inet_pton(int af, const char *src, void *dst)
 	return inet_pton(af, src, dst);
 #else
 	if (af == AF_INET) {
-		int a,b,c,d;
+		unsigned a,b,c,d;
 		char more;
 		struct in_addr *addr = dst;
-		if (sscanf(src, "%d.%d.%d.%d%c", &a,&b,&c,&d,&more) != 4)
+		if (sscanf(src, "%u.%u.%u.%u%c", &a,&b,&c,&d,&more) != 4)
 			return 0;
-		if (a < 0 || a > 255) return 0;
-		if (b < 0 || b > 255) return 0;
-		if (c < 0 || c > 255) return 0;
-		if (d < 0 || d > 255) return 0;
+		if (a > 255) return 0;
+		if (b > 255) return 0;
+		if (c > 255) return 0;
+		if (d > 255) return 0;
 		addr->s_addr = htonl((a<<24) | (b<<16) | (c<<8) | d);
 		return 1;
 #ifdef AF_INET6
@@ -1941,7 +1941,7 @@ evutil_inet_pton(int af, const char *src, void *dst)
 		else if (!dot)
 			eow = src+strlen(src);
 		else {
-			int byte1,byte2,byte3,byte4;
+			unsigned byte1,byte2,byte3,byte4;
 			char more;
 			for (eow = dot-1; eow >= src && EVUTIL_ISDIGIT_(*eow); --eow)
 				;
@@ -1949,14 +1949,14 @@ evutil_inet_pton(int af, const char *src, void *dst)
 
 			/* We use "scanf" because some platform inet_aton()s are too lax
 			 * about IPv4 addresses of the form "1.2.3" */
-			if (sscanf(eow, "%d.%d.%d.%d%c",
+			if (sscanf(eow, "%u.%u.%u.%u%c",
 					   &byte1,&byte2,&byte3,&byte4,&more) != 4)
 				return 0;
 
-			if (byte1 > 255 || byte1 < 0 ||
-				byte2 > 255 || byte2 < 0 ||
-				byte3 > 255 || byte3 < 0 ||
-				byte4 > 255 || byte4 < 0)
+			if (byte1 > 255 ||
+			    byte2 > 255 ||
+			    byte3 > 255 ||
+			    byte4 > 255)
 				return 0;
 
 			words[6] = (byte1<<8) | byte2;
diff --git a/test/regress_util.c b/test/regress_util.c
index d64d0024..1fb2c864 100644
--- a/test/regress_util.c
+++ b/test/regress_util.c
@@ -179,10 +179,10 @@ regress_ipv6_parse(void *ptr)
 		for (j = 0; j < 4; ++j) {
 			/* Can't use s6_addr32 here; some don't have it. */
 			ev_uint32_t u =
-				(in6.s6_addr[j*4  ] << 24) |
-				(in6.s6_addr[j*4+1] << 16) |
-				(in6.s6_addr[j*4+2] << 8) |
-				(in6.s6_addr[j*4+3]);
+			    ((ev_uint32_t)in6.s6_addr[j*4  ] << 24) |
+			    ((ev_uint32_t)in6.s6_addr[j*4+1] << 16) |
+			    ((ev_uint32_t)in6.s6_addr[j*4+2] << 8) |
+			    ((ev_uint32_t)in6.s6_addr[j*4+3]);
 			if (u != ent->res[j]) {
 				TT_FAIL(("%s did not parse as expected.", ent->addr));
 				continue;