diff --git a/extension/content/modules/Core.jsm b/extension/content/modules/Core.jsm
index d30181b..1109b78 100644
--- a/extension/content/modules/Core.jsm
+++ b/extension/content/modules/Core.jsm
@@ -21,7 +21,7 @@ function parseEasyKey(key, zotero) {
 function fixStyleId(styleId) {
     if (!styleId) {
         return  'http://www.zotero.org/styles/chicago-note-bibliography';
-    } else if (!styleId.match(/^http:/)) {
+    } else if (!styleId.match(/^https?:/)) {
         return 'http://www.zotero.org/styles/' + styleId;
     } else {
         return styleId;