diff --git a/hw/core/loader.c b/hw/core/loader.c
index a711145..d569636 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -726,7 +726,7 @@
         addr  = rom->addr;
         addr += rom->romsize;
         section = memory_region_find(get_system_memory(), rom->addr, 1);
-        rom->isrom = section.size && memory_region_is_rom(section.mr);
+        rom->isrom = int128_nz(section.size) && memory_region_is_rom(section.mr);
     }
     qemu_register_reset(rom_reset, NULL);
     roms_loaded = 1;