diff --git a/src/posix/cocoa/i_input.mm b/src/posix/cocoa/i_input.mm
index b3315f804..8b81f86ad 100644
--- a/src/posix/cocoa/i_input.mm
+++ b/src/posix/cocoa/i_input.mm
@@ -162,7 +162,7 @@ void CheckNativeMouse()
 			&& (MENU_On == menuactive || MENU_OnNoPause == menuactive);
 	}
 
-	if (!wantNative && primaryLevel->localEventManager->CheckRequireMouse())
+	if (!wantNative && sysCallbacks && sysCallbacks->WantNativeMouse && sysCallbacks->WantNativeMouse())
 		wantNative = true;
 
 	I_SetNativeMouse(wantNative);
diff --git a/src/posix/cocoa/st_start.mm b/src/posix/cocoa/st_start.mm
index 76df07f18..044c36986 100644
--- a/src/posix/cocoa/st_start.mm
+++ b/src/posix/cocoa/st_start.mm
@@ -39,6 +39,7 @@
 #include "st_console.h"
 #include "st_start.h"
 #include "printf.h"
+#include "engineerrors.h"
 
 
 FStartupScreen *StartScreen;
diff --git a/src/posix/sdl/i_input.cpp b/src/posix/sdl/i_input.cpp
index ad2181ae6..164b0b228 100644
--- a/src/posix/sdl/i_input.cpp
+++ b/src/posix/sdl/i_input.cpp
@@ -243,6 +243,9 @@ static void I_CheckNativeMouse ()
 	bool captureModeInGame = sysCallbacks && sysCallbacks->CaptureModeInGame && sysCallbacks->CaptureModeInGame();
 	bool wantNative = !focus || (!use_mouse || GUICapture || !captureModeInGame);
 
+	if (!wantNative && sysCallbacks && sysCallbacks->WantNativeMouse && sysCallbacks->WantNativeMouse())
+		wantNative = true;
+
 	if (wantNative != NativeMouse)
 	{
 		NativeMouse = wantNative;
diff --git a/src/posix/sdl/i_system.cpp b/src/posix/sdl/i_system.cpp
index af7775114..43b8c8664 100644
--- a/src/posix/sdl/i_system.cpp
+++ b/src/posix/sdl/i_system.cpp
@@ -53,6 +53,7 @@
 #include "cmdlib.h"
 #include "m_argv.h"
 #include "i_sound.h"
+#include "i_interface.h"
 
 
 #ifndef NO_GTK