diff --git a/src/tsg_gtp_signaling.cpp b/src/tsg_gtp_signaling.cpp
index c721e29..9cfab94 100644
--- a/src/tsg_gtp_signaling.cpp
+++ b/src/tsg_gtp_signaling.cpp
@@ -97,6 +97,9 @@ void free_gtp_signaling_field(void *data)
 		}
 	}
 
+	free(data);
+	data=NULL;
+
 	return ;
 }