diff --git a/effects/snow/snow.cpp b/effects/snow/snow.cpp
index 76f468e3e9..bcb1cecb71 100644
--- a/effects/snow/snow.cpp
+++ b/effects/snow/snow.cpp
@@ -276,6 +276,7 @@ void SnowEffect::toggle()
         if( mUseShader )
             {
             delete mShader;
+            mShader = NULL;
             mInited = false;
             mUseShader = true;
             }