diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h
index 18bc961..26315eb 100644
--- a/src/arch/x86/include/arch/cpu.h
+++ b/src/arch/x86/include/arch/cpu.h
@@ -113,7 +113,7 @@
 
 struct cpu_device_id {
 	unsigned int vendor;
-	unsigned int device;
+	uint32_t device;
 };
 
 struct cpu_driver {