diff --git a/sys/v4l2/gstv4l2videodec.c b/sys/v4l2/gstv4l2videodec.c
index d1d1b95..dc06774 100644
--- a/sys/v4l2/gstv4l2videodec.c
+++ b/sys/v4l2/gstv4l2videodec.c
@@ -67,8 +67,10 @@
 
   switch (prop_id) {
     case PROP_CAPTURE_IO_MODE:
-      gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value,
-          pspec);
+      if (!gst_v4l2_object_set_property_helper (self->v4l2capture,
+              prop_id, value, pspec)) {
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      }
       break;
 
       /* By default, only set on output */
@@ -89,8 +91,10 @@
 
   switch (prop_id) {
     case PROP_CAPTURE_IO_MODE:
-      gst_v4l2_object_get_property_helper (self->v4l2capture, prop_id, value,
-          pspec);
+      if (!gst_v4l2_object_get_property_helper (self->v4l2capture,
+              prop_id, value, pspec)) {
+        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      }
       break;
 
       /* By default read from output */