diff --git a/include/linux/time.h b/include/linux/time.h
index 14ff5b6..14a144d 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -11,6 +11,15 @@
 
 #define _REENT_ONLY
 
+#define MSEC_PER_SEC	1000L
+#define USEC_PER_MSEC	1000L
+#define NSEC_PER_USEC	1000L
+#define NSEC_PER_MSEC	1000000L
+#define USEC_PER_SEC	1000000L
+#define NSEC_PER_SEC	1000000000L
+#define PSEC_PER_SEC	1000000000000LL
+#define FSEC_PER_SEC	1000000000000000LL
+
 #define SECSPERMIN	60L
 #define MINSPERHOUR	60L
 #define HOURSPERDAY	24L