diff --git a/block/gluster.c b/block/gluster.c
index f03d05251e..e9c038042b 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -514,7 +514,6 @@ static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
     SocketAddressList **tail;
     QDict *backing_options = NULL;
     Error *local_err = NULL;
-    char *str = NULL;
     const char *ptr;
     int i, type, num_servers;
 
@@ -547,7 +546,8 @@ static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
     tail = &gconf->server;
 
     for (i = 0; i < num_servers; i++) {
-        str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i);
+        g_autofree char *str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.",
+                                               i);
         qdict_extract_subqdict(options, &backing_options, str);
 
         /* create opts info from runtime_type_opts list */
@@ -658,8 +658,6 @@ static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
 
         qobject_unref(backing_options);
         backing_options = NULL;
-        g_free(str);
-        str = NULL;
     }
 
     return 0;
@@ -668,7 +666,6 @@ out:
     error_propagate(errp, local_err);
     qapi_free_SocketAddress(gsconf);
     qemu_opts_del(opts);
-    g_free(str);
     qobject_unref(backing_options);
     errno = EINVAL;
     return -errno;