diff --git a/src/i_system.h b/src/i_system.h
index 61f5bf8a1..cbe4aaf3a 100644
--- a/src/i_system.h
+++ b/src/i_system.h
@@ -56,7 +56,7 @@ precise_t I_GetPreciseTime(void);
 
 /**	\brief	Converts a precise_t to microseconds and casts it to a 32 bit integer.
   */
-INT64 I_PreciseToMicros(precise_t d);
+int I_PreciseToMicros(precise_t d);
 
 /**	\brief	The I_Sleep function
 
diff --git a/src/screen.c b/src/screen.c
index 79b6d7578..7d27e31af 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -535,7 +535,7 @@ void SCR_CalculateFPS(void)
 	precise_t endTime = 0;
 
 	static precise_t updateTime = 0;
-	INT64 updateElapsed = 0;
+	int updateElapsed = 0;
 	int i;
 
 	endTime = I_GetPreciseTime();
@@ -545,7 +545,7 @@ void SCR_CalculateFPS(void)
 	if (updateElapsed >= FPS_SAMPLE_RATE)
 	{
 		static int sampleIndex = 0;
-		INT64 frameElapsed = I_PreciseToMicros(endTime - startTime);
+		int frameElapsed = I_PreciseToMicros(endTime - startTime);
 
 		fps_samples[sampleIndex] = frameElapsed / 1000.0f;
 
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index 3de164aa6..bd02f74d6 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -1672,7 +1672,7 @@ precise_t I_GetPreciseTime(void)
 	return SDL_GetPerformanceCounter();
 }
 
-INT64 I_PreciseToMicros(precise_t d)
+int I_PreciseToMicros(precise_t d)
 {
 	// d is going to be converted into a double. So remove the highest bits
 	// to avoid loss of precision in the lower bits, for the (probably rare) case
@@ -1705,7 +1705,7 @@ boolean I_CheckFrameCap(void)
 {
 	static precise_t start = 0;
 	precise_t end;
-	INT64 elapsed;
+	int elapsed;
 
 	UINT32 capFrames = R_GetFramerateCap();
 	int capMicros = 0;