diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index 3cb9bfdd27..1bf52f2380 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -990,7 +990,7 @@ YUV2PACKED16WRAPPER(yuv2, rgb48, bgr48le, PIX_FMT_BGR48LE)
  * correct RGB values into the destination buffer.
  */
 static av_always_inline void
-yuv2rgb_write(uint8_t *_dest, int i, unsigned Y1, unsigned Y2,
+yuv2rgb_write(uint8_t *_dest, int i, int Y1, int Y2,
               unsigned A1, unsigned A2,
               const void *_r, const void *_g, const void *_b, int y,
               enum PixelFormat target, int hasAlpha)