diff --git a/include/linux/time.h b/include/linux/time.h
index 614dd84..7b4dc365 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -48,7 +48,7 @@
  * Returns true if the timespec is norm, false if denorm:
  */
 #define timespec_valid(ts) \
-	(((ts)->tv_sec >= 0) && (((unsigned) (ts)->tv_nsec) < NSEC_PER_SEC))
+	(((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
 
 /*
  * 64-bit nanosec type. Large enough to span 292+ years in nanosecond