diff --git a/src/core/renderers/webgl/TextureManager.js b/src/core/renderers/webgl/TextureManager.js
index bf594a0..b685c1a 100644
--- a/src/core/renderers/webgl/TextureManager.js
+++ b/src/core/renderers/webgl/TextureManager.js
@@ -83,7 +83,7 @@
         // if the location is undefined then this may have been called by n event.
         // this being the case the texture may already be bound to a slot. As a texture can only be bound once
         // we need to find its current location if it exists.
-        if (location == null)
+        if (location === undefined)
         {
             location = 0;