diff --git a/ncat/ncat_main.c b/ncat/ncat_main.c
index 9e2583dcd..ee06f0130 100644
--- a/ncat/ncat_main.c
+++ b/ncat/ncat_main.c
@@ -819,7 +819,7 @@ int main(int argc, char *argv[])
             if (!o.listen)
                 bye("Proxy type (--proxy-type) specified without proxy address (--proxy).");
             if (strcmp(o.proxytype, "http"))
-                bye("Invalid proxy type \"%s\".", o.proxytype);
+                bye("Invalid proxy type \"%s\"; Ncat proxy server only supports \"http\".", o.proxytype);
         }
     }