diff --git a/src/js/assets.js b/src/js/assets.js
index 41e75ab7b..86c00fc3e 100644
--- a/src/js/assets.js
+++ b/src/js/assets.js
@@ -55,7 +55,7 @@ var oneDay = 24 * oneHour;
 var projectRepositoryRoot = µBlock.projectServerRoot;
 var thirdpartiesRepositoryRoot = 'https://raw.githubusercontent.com/gorhill/uAssets/master/src';
 var nullFunc = function() {};
-var reIsExternalPath = /^https?:\/\/[a-z0-9]/;
+var reIsExternalPath = /^[a-z]+:\/\//;
 var reIsUserPath = /^assets\/user\//;
 var lastRepoMetaTimestamp = 0;
 var lastRepoMetaIsRemote = false;