diff --git a/drivers/devfreq/governor_bw_hwmon.c b/drivers/devfreq/governor_bw_hwmon.c
index 2a57dc847279..fd95f4f145a8 100644
--- a/drivers/devfreq/governor_bw_hwmon.c
+++ b/drivers/devfreq/governor_bw_hwmon.c
@@ -154,7 +154,7 @@ out:									\
 #define MAX_MS	500U
 
 /* Returns MBps of read/writes for the sampling window. */
-static unsigned int bytes_to_mbps(long long bytes, unsigned int us)
+static unsigned long bytes_to_mbps(unsigned long long bytes, unsigned int us)
 {
 	bytes *= USEC_PER_SEC;
 	do_div(bytes, us);