diff --git a/src/scene/forward-renderer.js b/src/scene/forward-renderer.js
index b4d653a1be4..032c3cfd9a9 100644
--- a/src/scene/forward-renderer.js
+++ b/src/scene/forward-renderer.js
@@ -391,7 +391,7 @@ pc.extend(pc, function () {
     }
 
     function getShadowMapFromCache(device, res, mode) {
-        shadowBuffer = shadowMapCache[mode][res];
+        var shadowBuffer = shadowMapCache[mode][res];
         if (!shadowBuffer) {
             shadowBuffer = createShadowMap(device, res, res, mode? mode : pc.SHADOW_DEPTH);
             shadowMapCache[mode][res] = shadowBuffer;