diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index fa8f717a6c..96e987c446 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -996,6 +996,7 @@ static int get_cv_ycbcr_matrix(AVCodecContext *avctx, CFStringRef *matrix) {
             break;
 
         case AVCOL_SPC_UNSPECIFIED:
+        case AVCOL_SPC_RGB:
             *matrix = NULL;
             break;