diff --git a/cinera/cinera_search_pre.js b/cinera/cinera_search_pre.js
index 630e29e..8c011fa 100644
--- a/cinera/cinera_search_pre.js
+++ b/cinera/cinera_search_pre.js
@@ -2930,7 +2930,10 @@ ComputeOptimalGridSize()
         Y: null,
     };
 
-    var WindowDim;
+    var WindowDim = {
+        X: null,
+        Y: null,
+    };
     if(CineraProps.IsMobile)
     {
         WindowDim = DeriveReliableWindowDimensions();