diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index 6a2ec2083043..44d3bb2a259d 100644
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -110,7 +110,7 @@ static __always_inline void __sti_mwait(u32 eax, u32 ecx)
  * New with Core Duo processors, MWAIT can take some hints based on CPU
  * capability.
  */
-static __always_inline void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
+static __always_inline void mwait_idle_with_hints(u32 eax, u32 ecx)
 {
 	if (static_cpu_has_bug(X86_BUG_MONITOR) || !current_set_polling_and_test()) {
 		const void *addr = &current_thread_info()->flags;