diff --git a/src/sdl/IMG_xpm.c b/src/sdl/IMG_xpm.c
index 8adfd343..af76ec1d 100644
--- a/src/sdl/IMG_xpm.c
+++ b/src/sdl/IMG_xpm.c
@@ -45,9 +45,10 @@
 #if 0
 #include "SDL_image.h"
 #else
-extern SDLCALL int SDLCALL IMG_isXPM(SDL_RWops *src);
-extern SDLCALL SDL_Surface *IMG_LoadXPM_RW(SDL_RWops *src);
-extern SDLCALL SDL_Surface * SDLCALL IMG_ReadXPMFromArray(const char **xpm);
+// SDLCALL terms removed from original SDL_image declarations
+int IMG_isXPM(SDL_RWops *src);
+SDL_Surface *IMG_LoadXPM_RW(SDL_RWops *src);
+SDL_Surface *IMG_ReadXPMFromArray(const char **xpm);
 #define IMG_SetError    SDL_SetError
 #define IMG_GetError    SDL_GetError
 #endif