diff --git a/lib/url.c b/lib/url.c
index 133418681..7fe713d3e 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -4319,6 +4319,11 @@ static CURLcode parse_remote_port(struct SessionHandle *data,
       *portptr = '\0'; /* cut off the name there */
       conn->remote_port = curlx_ultous(port);
     }
+    else if(!port)
+      /* Browser behavior adaptation. If there's a colon with no digits after,
+         just cut off the name there which makes us ignore the colon and just
+         use the default port. Firefox and Chrome both do that. */
+      *portptr = '\0';
   }
   return CURLE_OK;
 }