diff --git a/sys/compat/ndis/ntoskrnl_var.h b/sys/compat/ndis/ntoskrnl_var.h
index 751f6aa37b15..9eba73639720 100644
--- a/sys/compat/ndis/ntoskrnl_var.h
+++ b/sys/compat/ndis/ntoskrnl_var.h
@@ -1309,6 +1309,7 @@ extern int ntoskrnl_libinit(void);
 extern int ntoskrnl_libfini(void);
 
 extern void ntoskrnl_intr(void *);
+extern void ntoskrnl_time(uint64_t *);
 
 extern uint16_t ExQueryDepthSList(slist_header *);
 extern slist_entry
diff --git a/sys/compat/ndis/subr_ndis.c b/sys/compat/ndis/subr_ndis.c
index 02b034aeefe1..8d3dfd9c3ec3 100644
--- a/sys/compat/ndis/subr_ndis.c
+++ b/sys/compat/ndis/subr_ndis.c
@@ -2661,20 +2661,11 @@ NdisMSynchronizeWithInterrupt(intr, syncfunc, syncctx)
 	return(KeSynchronizeExecution(intr->ni_introbj, syncfunc, syncctx));
 }
 
-/*
- * Return the number of 100 nanosecond intervals since
- * January 1, 1601. (?!?!)
- */
 static void
 NdisGetCurrentSystemTime(tval)
 	uint64_t		*tval;
 {
-	struct timespec		ts;
-
-	nanotime(&ts);
-	*tval = (uint64_t)ts.tv_nsec / 100 + (uint64_t)ts.tv_sec * 10000000 +
-	    11644473600;
-
+	ntoskrnl_time(tval);
 	return;
 }
 
diff --git a/sys/compat/ndis/subr_ntoskrnl.c b/sys/compat/ndis/subr_ntoskrnl.c
index b0fda80d5671..0be598d4f984 100644
--- a/sys/compat/ndis/subr_ntoskrnl.c
+++ b/sys/compat/ndis/subr_ntoskrnl.c
@@ -218,7 +218,6 @@ static int atoi (const char *);
 static long atol (const char *);
 static int rand(void);
 static void srand(unsigned int);
-static void ntoskrnl_time(uint64_t *);
 static uint8_t IoIsWdmVersionAvailable(uint8_t, uint8_t);
 static void ntoskrnl_thrfunc(void *);
 static ndis_status PsCreateSystemThread(ndis_handle *,
@@ -1574,7 +1573,11 @@ ntoskrnl_waittest(obj, increment)
 	return;
 }
 
-static void 
+/*
+ * Return the number of 100 nanosecond intervals since
+ * January 1, 1601. (?!?!)
+ */
+void
 ntoskrnl_time(tval)
 	uint64_t                *tval;
 {
@@ -1582,7 +1585,7 @@ ntoskrnl_time(tval)
 
 	nanotime(&ts);
 	*tval = (uint64_t)ts.tv_nsec / 100 + (uint64_t)ts.tv_sec * 10000000 +
-	    11644473600;
+	    11644473600 * 10000000; /* 100ns ticks from 1601 to 1970 */
 
 	return;
 }