diff --git a/sys/compat/linuxkpi/common/include/linux/time.h b/sys/compat/linuxkpi/common/include/linux/time.h
index c7a41a83f4aa..2b69ec46935c 100644
--- a/sys/compat/linuxkpi/common/include/linux/time.h
+++ b/sys/compat/linuxkpi/common/include/linux/time.h
@@ -28,6 +28,8 @@
 #ifndef _LINUXKPI_LINUX_TIME_H_
 #define	_LINUXKPI_LINUX_TIME_H_
 
+#define	MSEC_PER_SEC	1000L
+
 #define	NSEC_PER_USEC	1000L
 #define	NSEC_PER_MSEC	1000000L
 #define	NSEC_PER_SEC	1000000000L