1 files changed, 2 insertions, 2 deletions
diff --git a/o3d/samples/o3djs/effect.js b/o3d/samples/o3djs/effect.js
index 7c87cef..0d23889 100644
--- a/o3d/samples/o3djs/effect.js
+++ b/o3d/samples/o3djs/effect.js
@@ -1310,11 +1310,11 @@ o3djs.effect.attachStandardShader = function(pack,
     // help the user get something on the screen. We check to make sure they
     // are not connected to something otherwise we'll get an error.
     var param = material.getParam('lightWorldPos');
-    if (!param.inputConnection) {
+    if (param && !param.inputConnection) {
       param.value = lightPos;
     }
     var param = material.getParam('lightColor');
-    if (!param.inputConnection) {
+    if (param && !param.inputConnection) {
       param.value = [1, 1, 1, 1];
     }
     return true;