diff --git a/src/network/gethostbyaddr_r.c b/src/network/gethostbyaddr_r.c
index 73e764474a58a2a13542935df98983c66840add0..66e03309408c9df979a0949a2f23acf3bd8b8591 100644
--- a/src/network/gethostbyaddr_r.c
+++ b/src/network/gethostbyaddr_r.c
@@ -18,6 +18,8 @@ int gethostbyaddr_r(const void *a, socklen_t l, int af,
 	socklen_t sl = af==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
 	int i;
 
+	*res = 0;
+
 	/* Load address argument into sockaddr structure */
 	if (af==AF_INET6 && l==16) memcpy(&sa.sin6.sin6_addr, a, 16);
 	else if (af==AF_INET && l==4) memcpy(&sa.sin.sin_addr, a, 4);
diff --git a/src/network/gethostbyname2_r.c b/src/network/gethostbyname2_r.c
index aa8b0a9ee5031bf67e6259ca5921ca61f957a24d..81f71d2160fef695510d53063ba7b8d55716977f 100644
--- a/src/network/gethostbyname2_r.c
+++ b/src/network/gethostbyname2_r.c
@@ -17,6 +17,7 @@ int gethostbyname2_r(const char *name, int af,
 	int i, cnt;
 	size_t align, need;
 
+	*res = 0;
 	cnt = __lookup_name(addrs, canon, name, af, AI_CANONNAME);
 	if (cnt<0) switch (cnt) {
 	case EAI_NONAME: