diff --git a/src/i_time.cpp b/src/i_time.cpp
index 2aada4861..516ecfad1 100644
--- a/src/i_time.cpp
+++ b/src/i_time.cpp
@@ -132,7 +132,7 @@ int I_WaitForTic(int prevtic)
 	{
 		// The minimum amount of time a thread can sleep is controlled by timeBeginPeriod.
 		// We set this to 1 ms in DoMain.
-		int sleepTime = prevtic - time;
+		uint64_t sleepTime = NSToMS(FirstFrameStartTime + TicToNS(prevtic + 1) - I_nsTime());
 		if (sleepTime > 2)
 			std::this_thread::sleep_for(std::chrono::milliseconds(sleepTime - 2));
 
@@ -154,7 +154,7 @@ uint64_t I_msTime()
 
 int I_GetTime()
 {
-	return NSToTic(CurrentFrameStartTime - FirstFrameStartTime) + 1;
+	return NSToTic(CurrentFrameStartTime - FirstFrameStartTime);
 }
 
 double I_GetTimeFrac()
diff --git a/src/posix/sdl/sdlvideo.cpp b/src/posix/sdl/sdlvideo.cpp
index 2c1beb1ee..8cae68739 100644
--- a/src/posix/sdl/sdlvideo.cpp
+++ b/src/posix/sdl/sdlvideo.cpp
@@ -557,11 +557,12 @@ void I_SetWindowTitle(const char* caption)
 {
 	auto Screen = static_cast<SDLFB *>(screen)->GetSDLWindow();
 	if (caption)
-		SDL_SetWindowTitle(Screen, caption);
+		SDL_SetWindowTitle(static_cast<SDLFB *>(screen)->GetSDLWindow(), caption);
 	else
 	{
 		FString default_caption;
 		default_caption.Format(GAMESIG " %s (%s)", GetVersionString(), GetGitTime());
-		SDL_SetWindowTitle(Screen, default_caption);
+		SDL_SetWindowTitle(static_cast<SDLFB *>(screen)->GetSDLWindow(), default_caption);
 	}
 }
+