diff --git a/src/i_time.cpp b/src/i_time.cpp
index 2c5727a4bc5..908dbdd59fc 100644
--- a/src/i_time.cpp
+++ b/src/i_time.cpp
@@ -143,9 +143,9 @@ uint64_t I_NSTime()
 uint64_t I_FPSTimeNS()
 {
 	if (FreezeTime == 0)
-		return NSToMS(CurrentFrameStartTime);
+		return CurrentFrameStartTime;
 	else
-		return NSToMS(GetClockTimeNS());
+		return GetClockTimeNS();
 }
 
 unsigned int I_MSTime()