diff --git a/src/i_time.c b/src/i_time.c
index aa18f6e36..39854b242 100644
--- a/src/i_time.c
+++ b/src/i_time.c
@@ -30,12 +30,6 @@ static precise_t enterprecise, oldenterprecise;
 static fixed_t entertic, oldentertics;
 static double tictimer;
 
-// A little more than the minimum sleep duration on Windows.
-// May be incorrect for other platforms, but we don't currently have a way to
-// query the scheduler granularity. SDL will do what's needed to make this as
-// low as possible though.
-#define MIN_SLEEP_DURATION_MS 2.1
-
 tic_t I_GetTime(void)
 {
 	return g_time.time;
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index acc57f8d2..3da4e6152 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -41,6 +41,12 @@ typedef LPVOID (WINAPI *p_MapViewOfFile) (HANDLE, DWORD, DWORD, DWORD, SIZE_T);
 #include <ntsecapi.h>
 #undef SystemFunction036
 
+// A little more than the minimum sleep duration on Windows.
+// May be incorrect for other platforms, but we don't currently have a way to
+// query the scheduler granularity. SDL will do what's needed to make this as
+// low as possible though.
+#define MIN_SLEEP_DURATION_MS 2.1
+
 #endif
 #include <stdio.h>
 #include <stdlib.h>