diff --git a/arch/openrisc/lib/delay.c b/arch/openrisc/lib/delay.c
index 01d9740ae6f3..0c12407d3d5c 100644
--- a/arch/openrisc/lib/delay.c
+++ b/arch/openrisc/lib/delay.c
@@ -41,7 +41,7 @@ inline void __const_udelay(unsigned long xloops)
 {
 	unsigned long long loops;
 
-	loops = xloops * loops_per_jiffy * HZ;
+	loops = (unsigned long long)xloops * loops_per_jiffy * HZ;
 
 	__delay(loops >> 32);
 }