diff --git a/common b/common
index 5b6a58f419..895baa0fa0 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 5b6a58f419c3d6fdd4abbe9943cd17a4fd2addcc
+Subproject commit 895baa0fa0f829ef752424a31bbb2cf68e63842e
diff --git a/examples/dynparams/filter.c b/examples/dynparams/filter.c
index 7554101f55..55b92de939 100644
--- a/examples/dynparams/filter.c
+++ b/examples/dynparams/filter.c
@@ -266,6 +266,7 @@ cb_play_clicked (GtkButton *button, gpointer *user_data)
 {
   _filter_data_t *fd = (_filter_data_t *) user_data;
 
+  g_return_if_fail (GST_IS_PIPELINE (fd->pipeline));
   if (GST_STATE (fd->pipeline) == GST_STATE_PLAYING)
   {
     ui_feedback_add (fd->ui, "Pipeline is already playing !\n");
diff --git a/tests/old/examples/dynparams/filter.c b/tests/old/examples/dynparams/filter.c
index 7554101f55..55b92de939 100644
--- a/tests/old/examples/dynparams/filter.c
+++ b/tests/old/examples/dynparams/filter.c
@@ -266,6 +266,7 @@ cb_play_clicked (GtkButton *button, gpointer *user_data)
 {
   _filter_data_t *fd = (_filter_data_t *) user_data;
 
+  g_return_if_fail (GST_IS_PIPELINE (fd->pipeline));
   if (GST_STATE (fd->pipeline) == GST_STATE_PLAYING)
   {
     ui_feedback_add (fd->ui, "Pipeline is already playing !\n");