diff --git a/tools/mergejs.py b/tools/mergejs.py
index 5a8ec42b4e..a0b7566af0 100755
--- a/tools/mergejs.py
+++ b/tools/mergejs.py
@@ -43,7 +43,7 @@ import sys
 
 SUFFIX_JAVASCRIPT = ".js"
 
-RE_REQUIRE = "@requires?:? (.*)\n" # TODO: Ensure in comment?
+RE_REQUIRE = "@requires?:?\s+(\S*)\s*\n" # TODO: Ensure in comment?
 
 class MissingImport(Exception):
     """Exception raised when a listed import is not found in the lib."""