diff --git a/libswscale/input.c b/libswscale/input.c
index 7ff7bfaa01..d7dbedd82f 100644
--- a/libswscale/input.c
+++ b/libswscale/input.c
@@ -65,9 +65,9 @@ rgb64ToUV_c_template(uint16_t *dstU, uint16_t *dstV,
     int32_t rv = rgb2yuv[RV_IDX], gv = rgb2yuv[GV_IDX], bv = rgb2yuv[BV_IDX];
     av_assert1(src1==src2);
     for (i = 0; i < width; i++) {
-        int r_b = input_pixel(&src1[i*4+0]);
-        int   g = input_pixel(&src1[i*4+1]);
-        int b_r = input_pixel(&src1[i*4+2]);
+        unsigned int r_b = input_pixel(&src1[i*4+0]);
+        unsigned int   g = input_pixel(&src1[i*4+1]);
+        unsigned int b_r = input_pixel(&src1[i*4+2]);
 
         dstU[i] = (ru*r + gu*g + bu*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;
         dstV[i] = (rv*r + gv*g + bv*b + (0x10001<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;