diff --git a/src/video_codec.c b/src/video_codec.c
index bd8e3c605..2bb8e78bd 100644
--- a/src/video_codec.c
+++ b/src/video_codec.c
@@ -1953,6 +1953,9 @@ void vc_copylineRG48toR12L(unsigned char * __restrict dst, const unsigned char *
 void vc_copylineRG48toRGB(unsigned char * __restrict dst, const unsigned char * __restrict src, int dst_len, int rshift,
                 int gshift, int bshift)
 {
+        UNUSED(rshift);
+        UNUSED(gshift);
+        UNUSED(bshift);
         OPTIMIZED_FOR (int x = 0; x <= dst_len - 4; x += 4) {
                 *dst++ = src[1];
                 *dst++ = src[3];