diff --git a/src/core/qgsvectorlayer.cpp b/src/core/qgsvectorlayer.cpp
index deff90888b3..30e82296e50 100644
--- a/src/core/qgsvectorlayer.cpp
+++ b/src/core/qgsvectorlayer.cpp
@@ -1481,6 +1481,9 @@ bool QgsVectorLayer::setSubsetString( QString subset )
   mDataSource = mDataProvider->dataSourceUri();
   updateExtents();
 
+  if ( res )
+    setCacheImage( 0 );
+
   return res;
 }
 
@@ -3461,7 +3464,6 @@ bool QgsVectorLayer::commitChanges()
     emit editingStopped();
   }
 
-
   mDataProvider->updateExtents();
   mDataProvider->updateFeatureCount();