diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index 71a3759a2d4e..60cc4f222cbf 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -42,8 +42,8 @@ static void delay_loop(unsigned long loops)
 		"	jnz 2b		\n"
 		"3:	dec %0		\n"
 
-		: /* we don't need output */
-		:"a" (loops)
+		: "+a" (loops)
+		:
 	);
 }