diff --git a/common/modules/highlight.jsm b/common/modules/highlight.jsm
index b21809b4..c3107342 100644
--- a/common/modules/highlight.jsm
+++ b/common/modules/highlight.jsm
@@ -202,7 +202,7 @@ var Highlights = Module("Highlight", {
 
         if (applyBindings)
             for each (let group in groups) {
-                if ("bindings" in applyBindings && group in applyBindings.bindings)
+                if (applyBindings.bindings && group in applyBindings.bindings)
                     applyBindings.bindings[group](node, applyBindings);
                 else if (group in template.bindings)
                     template.bindings[group](node, applyBindings);