diff --git a/validate/gst/validate/gst-validate-bin-monitor.c b/validate/gst/validate/gst-validate-bin-monitor.c
index e508aa7..9199b95 100644
--- a/validate/gst/validate/gst-validate-bin-monitor.c
+++ b/validate/gst/validate/gst-validate-bin-monitor.c
@@ -210,8 +210,8 @@ static void
 _bus_handler (GstBus * bus, GstMessage * message,
     GstValidateBinMonitor * monitor)
 {
-  GError *err;
-  gchar *debug;
+  GError *err = NULL;
+  gchar *debug = NULL;

   switch (GST_MESSAGE_TYPE (message)) {
     case GST_MESSAGE_ERROR: