diff --git a/functions.h b/functions.h
index 2387fa19d1..74d6980f40 100644
--- a/functions.h
+++ b/functions.h
@@ -126,6 +126,12 @@ static inline TileIndex RandomTile(void) { return TILE_MASK(Random()); }
 uint32 InteractiveRandom(void); /* Used for random sequences that are not the same on the other end of the multiplayer link */
 uint InteractiveRandomRange(uint max);
 
+
+// Used for profiling
+#define TIC() { extern uint32 rdtsc(void); uint32 _xxx_ = rdtsc();
+#define TOC(s) 	_xxx_ = rdtsc() - _xxx_; printf("%s: %d\n", s, _xxx_); }
+
+
 void SetDate(uint date);
 /* facedraw.c */
 void DrawPlayerFace(uint32 face, int color, int x, int y);
diff --git a/win32.c b/win32.c
index f6d416833d..c84a850665 100644
--- a/win32.c
+++ b/win32.c
@@ -2038,7 +2038,7 @@ static int ParseCommandLine(char *line, char **argv, int max_argc)
 
 
 #if defined(_MSC_VER)
-static uint64 _declspec(naked) rdtsc(void)
+uint32 _declspec(naked) rdtsc(void)
 {
 	_asm {
 		rdtsc