diff --git a/node_modules/c9/urls.js b/node_modules/c9/urls.js
index 0284030c..f93d4468 100644
--- a/node_modules/c9/urls.js
+++ b/node_modules/c9/urls.js
@@ -73,6 +73,9 @@ function getBaseUrl(req, sourceBaseUrlPattern, targetBaseUrlPattern) {
 
     if (!sourceBaseUrlPattern)
         throw new Error("getBaseUrl() requires at least two arguments");
+        
+    if (!targetBaseUrlPattern)
+        targetBaseUrlPattern = sourceBaseUrlPattern;
 
     var sourceHostMatcher = sourceBaseUrlPattern
         .replace(/^https?:\/\//, "")
@@ -91,15 +94,10 @@ function getBaseUrl(req, sourceBaseUrlPattern, targetBaseUrlPattern) {
         targetHost = "c9.io";
     }
 
-    if (/^(ide|vfs)./.test(targetHost) && !targetBaseUrlPattern)
-        console.error(new Error("Warning: no targetBaseUrlPattern specified, will stay at " + targetHost), {
-            sourceBaseUrlPattern: sourceBaseUrlPattern
-        });
-
     if (/^(ide|vfs)./.test(targetHost))
         console.trace("Warning: possibly incorrect baseUrl constructed, with 'ide.' in the hostname: " + targetHost);
 
-    return replaceDomain(targetBaseUrlPattern || sourceBaseUrlPattern, targetHost)
+    return replaceDomain(targetBaseUrlPattern, targetHost)
         .replace(/\/$/, "");
 }