diff --git a/src/osd/sdl/SDL1211_opengl.h b/src/osd/sdl/SDL1211_opengl.h
index b0af591f432..aba8e602890 100644
--- a/src/osd/sdl/SDL1211_opengl.h
+++ b/src/osd/sdl/SDL1211_opengl.h
@@ -22,7 +22,6 @@
 
 /* This is a simple file to encapsulate the OpenGL API headers */
  
-//#include "SDL_config.h"
 #include <SDL/SDL_config.h>
 
 #ifdef __WIN32__
diff --git a/src/osd/sdl/drawsdl.c b/src/osd/sdl/drawsdl.c
index eebba6225db..230715f40de 100644
--- a/src/osd/sdl/drawsdl.c
+++ b/src/osd/sdl/drawsdl.c
@@ -32,12 +32,6 @@
 //  CONSTANTS
 //============================================================
 
-//============================================================
-//  MACROS
-//============================================================
-
-//#define IS_YUV_MODE(_m)				((_m) >= VIDEO_SCALE_MODE_YV12 && (_m) <= VIDEO_SCALE_MODE_YUY2X2)
-
 //============================================================
 //  TYPES
 //============================================================
diff --git a/src/osd/sdl/input.c b/src/osd/sdl/input.c
index bc408461069..4442993bee5 100644
--- a/src/osd/sdl/input.c
+++ b/src/osd/sdl/input.c
@@ -213,7 +213,7 @@ struct _kt_table {
 #define OSD_SDL_INDEX_KEYSYM(keysym) ((keysym)->scancode)
 
 #define GET_WINDOW(ev) window_from_id((ev)->windowID)
-// FIXME: sdl does not properly report the window for certain ops.
+// FIXME: sdl does not properly report the window for certain OS.
 #define GET_FOCUS_WINDOW(ev) focus_window
 //#define GET_FOCUS_WINDOW(ev) window_from_id((ev)->windowID)
 
diff --git a/src/osd/sdl/sdlfile.c b/src/osd/sdl/sdlfile.c
index e06c8e37f69..acc52d6d8f9 100644
--- a/src/osd/sdl/sdlfile.c
+++ b/src/osd/sdl/sdlfile.c
@@ -28,7 +28,6 @@
 #include <errno.h>
 
 // MAME headers
-//#include "osdepend.h"
 #include "osdcore.h"
 
 #if defined(SDLMAME_WIN32) || defined(SDLMAME_OS2)
diff --git a/src/osd/sdl/sdlos_macosx.c b/src/osd/sdl/sdlos_macosx.c
index 7ea714811c7..5ce21f87573 100644
--- a/src/osd/sdl/sdlos_macosx.c
+++ b/src/osd/sdl/sdlos_macosx.c
@@ -26,7 +26,6 @@
 #include <mach/mach_time.h>
 
 // MAME headers
-//#include "osdepend.h"
 #include "osdcore.h"
 
 //============================================================
diff --git a/src/osd/sdl/sdlos_unix.c b/src/osd/sdl/sdlos_unix.c
index 88dea54fa65..610d63b3237 100644
--- a/src/osd/sdl/sdlos_unix.c
+++ b/src/osd/sdl/sdlos_unix.c
@@ -9,9 +9,6 @@
 //
 //============================================================
 
-// standard sdl header
-//#include <SDL/SDL.h>
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
diff --git a/src/osd/sdl/sdlsync_sdl.c b/src/osd/sdl/sdlsync_sdl.c
index 3a233d628fd..d728aea9392 100644
--- a/src/osd/sdl/sdlsync_sdl.c
+++ b/src/osd/sdl/sdlsync_sdl.c
@@ -298,7 +298,7 @@ static int worker_thread_entry(void *param)
 {
 	osd_thread *thread = (osd_thread *) param;
 	void *res;
-//#ifdef PTR64
+
 	res = thread->callback(thread->param);
 #ifdef PTR64
 	return (int) (INT64) res;
diff --git a/src/osd/sdl/sdlsync_tc.c b/src/osd/sdl/sdlsync_tc.c
index 73026a4767d..34100c09135 100644
--- a/src/osd/sdl/sdlsync_tc.c
+++ b/src/osd/sdl/sdlsync_tc.c
@@ -26,7 +26,6 @@
 // MAME headers
 #include "osdcore.h"
 
-//#include "osinline.h"
 #include "sdlsync.h"
 
 #include <pthread.h>