diff --git a/doc/Changelog b/doc/Changelog
index 9e8aff2fb..2dfbdd386 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,6 +1,7 @@
 16 May 2013: Wouter
-	- Fix use-after-free in out-of-memory handling code (thanks Jake
+	- Fix#499 use-after-free in out-of-memory handling code (thanks Jake
 	  Montgomery).
+	- Fix#500 use on non-initialised values on socket bind failures.
 
 15 May 2013: Wouter
 	- Fix round-robin doesn't work with some Windows clients (from Ilya
diff --git a/services/listen_dnsport.c b/services/listen_dnsport.c
index 647cbe07e..368faaea4 100644
--- a/services/listen_dnsport.c
+++ b/services/listen_dnsport.c
@@ -328,6 +328,8 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 #    else
 			closesocket(s);
 #    endif
+			*noproto = 0;
+			*inuse = 0;
 			return -1;
 		}
 #  elif defined(IP_DONTFRAG)
@@ -341,12 +343,15 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 #    else
 			closesocket(s);
 #    endif
+			*noproto = 0;
+			*inuse = 0;
 			return -1;
 		}
 #  endif /* IPv4 MTU */
 	}
 	if(bind(s, (struct sockaddr*)addr, addrlen) != 0) {
 		*noproto = 0;
+		*inuse = 0;
 #ifndef USE_WINSOCK
 #ifdef EADDRINUSE
 		*inuse = (errno == EADDRINUSE);