diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index 16f0b223102e..1cd46a345cb0 100644
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -280,7 +280,7 @@ static ktime_t dccp_timestamp_seed;
  */
 u32 dccp_timestamp(void)
 {
-	s64 delta = ktime_us_delta(ktime_get_real(), dccp_timestamp_seed);
+	u64 delta = (u64)ktime_us_delta(ktime_get_real(), dccp_timestamp_seed);
 
 	do_div(delta, 10);
 	return delta;