diff --git a/src/osd/sdl/debugwin.c b/src/osd/sdl/debugwin.c
index 97c90a1b168..808ea07e762 100644
--- a/src/osd/sdl/debugwin.c
+++ b/src/osd/sdl/debugwin.c
@@ -15,6 +15,7 @@
 #include <gtk/gtk.h>
 
 #include "dview.h"
+#include "osdsdl.h"
 #include "debug/dvdisasm.h"
 #include "debug/dvmemory.h"
 #include "debug/dvstate.h"
diff --git a/src/osd/sdl/osdsdl.h b/src/osd/sdl/osdsdl.h
index 5ff61a4c9f3..47535d88f76 100644
--- a/src/osd/sdl/osdsdl.h
+++ b/src/osd/sdl/osdsdl.h
@@ -1,6 +1,8 @@
 #ifndef _osdsdl_h_
 #define _osdsdl_h_
 
+#include <SDL/SDL.h>
+
 //============================================================
 //  System dependent defines
 //============================================================