diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 3548f166c..b95c1ecea 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -2399,6 +2399,7 @@ static int gdb_target_description_supported(struct target *target, int *supporte
 			&reg_list_size, REG_CLASS_ALL);
 	if (retval != ERROR_OK) {
 		LOG_ERROR("get register list failed");
+		reg_list = NULL;
 		goto error;
 	}