diff --git a/src/sdl/i_video.c b/src/sdl/i_video.c
index 590d7d142..a70e5a860 100644
--- a/src/sdl/i_video.c
+++ b/src/sdl/i_video.c
@@ -382,10 +382,8 @@ static INT32 Impl_SDL_Scancode_To_Keycode(SDL_Scancode code)
 	return 0;
 }
 
-static boolean IgnoreMouse(void)
+static boolean ShouldIgnoreMouse(void)
 {
-	if (cv_alwaysgrabmouse.value)
-		return false;
 	if (menuactive)
 		return !M_MouseNeeded();
 	if (paused || con_destlines || chat_on)
@@ -393,11 +391,20 @@ static boolean IgnoreMouse(void)
 	if (gamestate != GS_LEVEL && gamestate != GS_INTERMISSION &&
 			gamestate != GS_CONTINUING && gamestate != GS_CUTSCENE)
 		return true;
-	if (!mousegrabbedbylua)
-		return true;
 	return false;
 }
 
+static boolean ShouldGrabMouse(void)
+{
+	if (cv_alwaysgrabmouse.value)
+		return true;
+	if (ShouldIgnoreMouse())
+		return false;
+	if (!mousegrabbedbylua)
+		return false;
+	return true;
+}
+
 static void SDLdoGrabMouse(void)
 {
 	SDL_ShowCursor(SDL_DISABLE);
@@ -424,7 +431,7 @@ void I_UpdateMouseGrab(void)
 {
 	if (SDL_WasInit(SDL_INIT_VIDEO) == SDL_INIT_VIDEO && window != NULL
 	&& SDL_GetMouseFocus() == window && SDL_GetKeyboardFocus() == window
-	&& USE_MOUSEINPUT && !IgnoreMouse())
+	&& USE_MOUSEINPUT && ShouldGrabMouse())
 		SDLdoGrabMouse();
 }
 
@@ -640,7 +647,7 @@ static void Impl_HandleWindowEvent(SDL_WindowEvent evt)
 		}
 		//else firsttimeonmouse = SDL_FALSE;
 
-		if (USE_MOUSEINPUT && !IgnoreMouse())
+		if (USE_MOUSEINPUT && ShouldGrabMouse())
 			SDLdoGrabMouse();
 	}
 	else if (!mousefocus && !kbfocus)
@@ -692,7 +699,7 @@ static void Impl_HandleMouseMotionEvent(SDL_MouseMotionEvent evt)
 
 	if (USE_MOUSEINPUT)
 	{
-		if ((SDL_GetMouseFocus() != window && SDL_GetKeyboardFocus() != window) || (IgnoreMouse() && !firstmove))
+		if ((SDL_GetMouseFocus() != window && SDL_GetKeyboardFocus() != window) || (!ShouldGrabMouse() && !firstmove))
 		{
 			SDLdoUngrabMouse();
 			firstmove = false;
@@ -745,7 +752,7 @@ static void Impl_HandleMouseButtonEvent(SDL_MouseButtonEvent evt, Uint32 type)
 	// this apparently makes a mouse button down event but not a mouse button up event,
 	// resulting in whatever key was pressed down getting "stuck" if we don't ignore it.
 	// -- Monster Iestyn (28/05/18)
-	if (SDL_GetMouseFocus() != window || IgnoreMouse())
+	if (SDL_GetMouseFocus() != window || ShouldIgnoreMouse())
 		return;
 
 	/// \todo inputEvent.button.which
@@ -1127,7 +1134,7 @@ void I_StartupMouse(void)
 	}
 	else
 		firsttimeonmouse = SDL_FALSE;
-	if (cv_usemouse.value && !IgnoreMouse())
+	if (cv_usemouse.value && ShouldGrabMouse())
 		SDLdoGrabMouse();
 	else
 		SDLdoUngrabMouse();