diff --git a/src/referencestrip.js b/src/referencestrip.js
index 97833e58..aef4e93e 100644
--- a/src/referencestrip.js
+++ b/src/referencestrip.js
@@ -224,7 +224,7 @@ $.ReferenceStrip = function ( options ) {
         this.panels.push( element );
 
     }
-    loadPanels( this, this.scroll == 'vertical' ? viewerSize.y : viewerSize.y, 0 );
+    loadPanels( this, this.scroll == 'vertical' ? viewerSize.y : viewerSize.x, 0 );
     this.setFocus( 0 );
 
 };