diff --git a/src/d_main.cpp b/src/d_main.cpp
index a261accdf..c34541193 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -174,6 +174,26 @@ extern bool insave;
 extern TDeletingArray<FLightDefaults *> LightDefaults;
 
 
+CUSTOM_CVAR(Float, i_timescale, 1.0f, CVAR_NOINITCALL)
+{
+	if (netgame)
+	{
+		Printf("Time scale cannot be changed in net games.\n");
+		self = 1.0f;
+	}
+	else if (self >= 0.05f)
+	{
+		I_FreezeTime(true);
+		TimeScale = self;
+		I_FreezeTime(false);
+	}
+	else
+	{
+		Printf("Time scale must be at least 0.05!\n");
+	}
+}
+
+
 // PUBLIC DATA DEFINITIONS -------------------------------------------------
 
 CUSTOM_CVAR (Int, fraglimit, 0, CVAR_SERVERINFO)
@@ -2883,6 +2903,7 @@ static int D_DoomMain_Internal (void)
 int D_DoomMain()
 {
 	int ret = 0;
+	GameTicRate = TICRATE;
 	try
 	{
 		ret = D_DoomMain_Internal();
diff --git a/src/utility/i_time.cpp b/src/utility/i_time.cpp
index 26d10e3c8..a4177e191 100644
--- a/src/utility/i_time.cpp
+++ b/src/utility/i_time.cpp
@@ -36,10 +36,6 @@
 #include <chrono>
 #include <thread>
 #include "i_time.h"
-#include "doomdef.h"
-#include "c_cvars.h"
-#include "doomstat.h"
-#include "doomtype.h"
 
 //==========================================================================
 //
@@ -50,27 +46,9 @@
 static uint64_t FirstFrameStartTime;
 static uint64_t CurrentFrameStartTime;
 static uint64_t FreezeTime;
+int GameTicRate;
 
-static double TimeScale = 1.0;
-
-CUSTOM_CVAR(Float, i_timescale, 1.0f, CVAR_NOINITCALL)
-{
-	if (netgame)
-	{
-		Printf("Time scale cannot be changed in net games.\n");
-		self = 1.0f;
-	}
-	else if (self >= 0.05f)
-	{
-		I_FreezeTime(true);
-		TimeScale = self;
-		I_FreezeTime(false);
-	}
-	else
-	{
-		Printf("Time scale must be at least 0.05!\n");
-	}
-}
+double TimeScale = 1.0;
 
 static uint64_t GetClockTimeNS()
 {
@@ -90,12 +68,12 @@ static uint64_t NSToMS(uint64_t ns)
 
 static int NSToTic(uint64_t ns)
 {
-	return static_cast<int>(ns * TICRATE / 1'000'000'000);
+	return static_cast<int>(ns * GameTicRate / 1'000'000'000);
 }
 
 static uint64_t TicToNS(int tic)
 {
-	return static_cast<uint64_t>(tic) * 1'000'000'000 / TICRATE;
+	return static_cast<uint64_t>(tic) * 1'000'000'000 / GameTicRate;
 }
 
 void I_SetFrameTime()
diff --git a/src/utility/i_time.h b/src/utility/i_time.h
index 63c4586f1..47d726de7 100644
--- a/src/utility/i_time.h
+++ b/src/utility/i_time.h
@@ -2,6 +2,9 @@
 
 #include <stdint.h>
 
+extern int GameTicRate;
+extern double TimeScale;
+
 // Called by D_DoomLoop, sets the time for the current frame
 void I_SetFrameTime();