diff --git a/libswscale/yuv2rgb.c b/libswscale/yuv2rgb.c
index 353de2f822..76232cb364 100644
--- a/libswscale/yuv2rgb.c
+++ b/libswscale/yuv2rgb.c
@@ -145,8 +145,8 @@ const int *sws_getCoefficients(int colorspace)
             dst_type av_unused *r, *g, *b;                                  \
             const uint8_t *py_1 = src[0] +  y       * srcStride[0];         \
             const uint8_t *py_2 = py_1   +            srcStride[0];         \
-            const uint8_t *pu   = src[1] + (y >> 1) * srcStride[1];         \
-            const uint8_t *pv   = src[2] + (y >> 1) * srcStride[2];         \
+            const uint8_t av_unused *pu = src[1] + (y >> 1) * srcStride[1]; \
+            const uint8_t av_unused *pv = src[2] + (y >> 1) * srcStride[2]; \
             const uint8_t av_unused *pa_1, *pa_2;                           \
             unsigned int h_size = c->dstW >> 3;                             \
             if (alpha) {                                                    \