diff --git a/compile.py b/compile.py
index 7d601828..657f00ab 100644
--- a/compile.py
+++ b/compile.py
@@ -91,7 +91,7 @@ def create_directory(dir):
if os.path.exists('html/copy/jquery-ui.min.js'):
index = index.replace("{$jqueryui}", "")
else:
- index = index.replace("{$jqueryui}", "")
+ index = index.replace("{$jqueryui}", '')
index_commands_version = opengl.commands_version_flat.keys()
index_commands_version.sort()