diff --git a/backends/platform/sdl/sdl.h b/backends/platform/sdl/sdl.h
index 1b0204a6e17..64e63b40a67 100644
--- a/backends/platform/sdl/sdl.h
+++ b/backends/platform/sdl/sdl.h
@@ -30,11 +30,6 @@
 #include "backends/events/sdl/sdl-events.h"
 #include "backends/log/log.h"
 
-namespace Common {
-struct KeyTableEntry;
-struct ModifierTableEntry;
-}
-
 /**
  * Base OSystem class for all SDL ports.
  */