diff --git a/src/android/InAppBrowser.java b/src/android/InAppBrowser.java
index 2d9c144..86a6745 100644
--- a/src/android/InAppBrowser.java
+++ b/src/android/InAppBrowser.java
@@ -1112,7 +1112,7 @@ public class InAppBrowser extends CordovaPlugin {
                 }
             }
             // Test for whitelisted custom scheme names like mycoolapp:// or twitteroauthresponse:// (Twitter Oauth Response)
-            else if (!url.startsWith("http:") && !url.startsWith("https:") && url.matches("^[a-z]://.*?$")) {
+            else if (!url.startsWith("http:") && !url.startsWith("https:") && url.matches("^[a-z]*://.*?$")) {
                 if (allowedSchemes == null) {
                     String allowed = preferences.getString("AllowedSchemes", "");
                     allowedSchemes = allowed.split(",");