2 files changed, 3 insertions, 3 deletions
diff --git a/backends/platform/sdl/graphics.cpp b/backends/platform/sdl/graphics.cpp
index 2a4e166ab2..d498c8f62a 100644
--- a/backends/platform/sdl/graphics.cpp
+++ b/backends/platform/sdl/graphics.cpp
@@ -24,6 +24,7 @@
  */
 
 #include "backends/platform/sdl/sdl.h"
+#include "common/mutex.h"
 #include "common/util.h"
 #include "graphics/font.h"
 #include "graphics/fontman.h"
diff --git a/backends/platform/sdl/sdl.h b/backends/platform/sdl/sdl.h
index 80a08de821..d657a964ba 100644
--- a/backends/platform/sdl/sdl.h
+++ b/backends/platform/sdl/sdl.h
@@ -32,8 +32,7 @@
 #include <SDL.h>
 #endif
 
-#include "common/scummsys.h"
-#include "common/system.h"
+#include "backends/base-backend.h"
 #include "graphics/scaler.h"
 
 
@@ -72,7 +71,7 @@ enum {
 };
 
 
-class OSystem_SDL : public OSystem {
+class OSystem_SDL : public BaseBackend {
 public:
 	OSystem_SDL();
 	virtual ~OSystem_SDL();