diff --git a/include/SDL_video.h b/include/SDL_video.h
index 7e3708ac9..9627f0987 100644
--- a/include/SDL_video.h
+++ b/include/SDL_video.h
@@ -460,14 +460,16 @@ extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA
 /*
  * Maps a pixel value into the RGB components for a given pixel format
  */
-extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel, SDL_PixelFormat *fmt,
+extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel,
+				const SDL_PixelFormat * const fmt,
 				Uint8 *r, Uint8 *g, Uint8 *b);
 
 /*
  * Maps a pixel value into the RGBA components for a given pixel format
  */
-extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat *fmt,
-				 Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);
+extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel,
+				const SDL_PixelFormat * const fmt,
+				Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a);
 
 /*
  * Allocate and free an RGB surface (must be called after SDL_SetVideoMode)
diff --git a/src/video/SDL_pixels.c b/src/video/SDL_pixels.c
index 841377f4c..47bbd7f9b 100644
--- a/src/video/SDL_pixels.c
+++ b/src/video/SDL_pixels.c
@@ -366,7 +366,7 @@ Uint32 SDL_MapRGBA
 	}
 }
 
-void SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat *fmt,
+void SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormat * const fmt,
 		 Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a)
 {
 	if ( fmt->palette == NULL ) {
@@ -400,7 +400,8 @@ void SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat *fmt,
 	}
 }
 
-void SDL_GetRGB(Uint32 pixel, SDL_PixelFormat *fmt, Uint8 *r,Uint8 *g,Uint8 *b)
+void SDL_GetRGB(Uint32 pixel, const SDL_PixelFormat * const fmt,
+                Uint8 *r,Uint8 *g,Uint8 *b)
 {
 	if ( fmt->palette == NULL ) {
 	        /* the note for SDL_GetRGBA above applies here too */