--- jwhois-4.0.0/src/utils.c
+++ jwhois-4.0.0/src/utils.c

@@ -288,7 +288,7 @@
 
       retlen = sizeof(retval);
       error = getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &retval, &retlen);
-      if (error < 0 || retval)
+      if (error == 0 && retval == 0)
 	{
 	  break;
 	}