diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
index 417ec0564b..285549c79b 100644
--- a/hw/rx/rx-gdbsim.c
+++ b/hw/rx/rx-gdbsim.c
@@ -122,9 +122,8 @@ static void rx_gdbsim_init(MachineState *machine)
         if (dtb_filename) {
             ram_addr_t dtb_offset;
             int dtb_size;
-            void *dtb;
+            g_autofree void *dtb = load_device_tree(dtb_filename, &dtb_size);
 
-            dtb = load_device_tree(dtb_filename, &dtb_size);
             if (dtb == NULL) {
                 error_report("Couldn't open dtb file %s", dtb_filename);
                 exit(1);