diff --git a/filter/snes_ntsc_config.h b/filter/snes_ntsc_config.h
index 2753a179..467c7ec6 100644
--- a/filter/snes_ntsc_config.h
+++ b/filter/snes_ntsc_config.h
@@ -3,7 +3,7 @@
 #ifndef SNES_NTSC_CONFIG_H
 #define SNES_NTSC_CONFIG_H
 
-#if !defined(SNES9X_GTK) && !defined(_WIN32)
+#if !defined(SNES9X_GTK) && !defined(_WIN32) && !defined(__LIBRETRO__)
 /* Format of source pixels */
 #define SNES_NTSC_IN_FORMAT SNES_NTSC_RGB15
 /* #define SNES_NTSC_IN_FORMAT SNES_NTSC_RGB16 */