3 files changed, 9 insertions, 0 deletions
diff --git a/src/video/cocoa_v.mm b/src/video/cocoa_v.mm
index f4dfc5b77..8e13605d8 100644
--- a/src/video/cocoa_v.mm
+++ b/src/video/cocoa_v.mm
@@ -685,6 +685,7 @@ static bool QZ_PollEvent()
 static void QZ_GameLoop()
 {
 	uint32 cur_ticks = GetTick();
+	uint32 last_cur_ticks = cur_ticks;
 	uint32 next_tick = cur_ticks + 30;
 	uint32 pal_tick = 0;
 #ifdef _DEBUG
@@ -731,6 +732,8 @@ static void QZ_GameLoop()
 		}
 
 		cur_ticks = GetTick();
+		_realtime_tick += cur_ticks - last_cur_ticks;
+		last_cur_ticks = cur_ticks;
 		if (cur_ticks >= next_tick || (_fast_forward && !_pause_game) || cur_ticks < prev_cur_ticks) {
 			next_tick = cur_ticks + 30;
 
diff --git a/src/video/sdl_v.cpp b/src/video/sdl_v.cpp
index 1e11b32c3..782ac1521 100644
--- a/src/video/sdl_v.cpp
+++ b/src/video/sdl_v.cpp
@@ -442,6 +442,7 @@ static void SdlVideoStop()
 static void SdlVideoMainLoop()
 {
 	uint32 cur_ticks = SDL_CALL SDL_GetTicks();
+	uint32 last_cur_ticks = cur_ticks;
 	uint32 next_tick = cur_ticks + 30;
 	uint32 pal_tick = 0;
 	uint32 mod;
@@ -471,6 +472,8 @@ static void SdlVideoMainLoop()
 		}
 
 		cur_ticks = SDL_CALL SDL_GetTicks();
+		_realtime_tick += cur_ticks - last_cur_ticks;
+		last_cur_ticks = cur_ticks;
 		if (cur_ticks >= next_tick || (_fast_forward && !_pause_game) || cur_ticks < prev_cur_ticks) {
 			next_tick = cur_ticks + 30;
 
diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
index 1508e1ebd..583f7f84b 100644
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -795,6 +795,7 @@ static void Win32GdiMainLoop()
 {
 	MSG mesg;
 	uint32 cur_ticks = GetTickCount();
+	uint32 last_cur_ticks = cur_ticks;
 	uint32 next_tick = cur_ticks + 30;
 
 	_wnd.running = true;
@@ -822,6 +823,8 @@ static void Win32GdiMainLoop()
 		}
 
 		cur_ticks = GetTickCount();
+		_realtime_tick += cur_ticks - last_cur_ticks;
+		last_cur_ticks = cur_ticks;
 		if (cur_ticks >= next_tick || (_fast_forward && !_pause_game) || cur_ticks < prev_cur_ticks) {
 			next_tick = cur_ticks + 30;
 			_ctrl_pressed = _wnd.has_focus && GetAsyncKeyState(VK_CONTROL)<0;