diff --git a/postproc/rgb2rgb.h b/postproc/rgb2rgb.h
index 771ccb8bb2..3b8e9abe19 100644
--- a/postproc/rgb2rgb.h
+++ b/postproc/rgb2rgb.h
@@ -16,6 +16,7 @@ extern void rgb32to16(const uint8_t *src,uint8_t *dst,unsigned src_size);
 extern void rgb32to15(const uint8_t *src,uint8_t *dst,unsigned src_size);
 extern void rgb24to16(const uint8_t *src,uint8_t *dst,unsigned src_size);
 extern void rgb24to15(const uint8_t *src,uint8_t *dst,unsigned src_size);
+extern void rgb32tobgr32(const uint8_t *src, uint8_t *dst, unsigned src_size);
 
 
 extern void palette8torgb32(const uint8_t *src, uint8_t *dst, unsigned num_pixels, const uint8_t *palette);