diff --git a/libavfilter/vf_thumbnail_cuda.cu b/libavfilter/vf_thumbnail_cuda.cu
index c73e49fbc6..d4d4d791f6 100644
--- a/libavfilter/vf_thumbnail_cuda.cu
+++ b/libavfilter/vf_thumbnail_cuda.cu
@@ -71,7 +71,7 @@ __global__ void Thumbnail_ushort2(cudaTextureObject_t ushort2_tex,
     {
         ushort2 pixel = tex2D<ushort2>(ushort2_tex, x, y);
         atomicAdd(&histogram[(pixel.x + 128) >> 8], 1);
-        atomicAdd(&histogram[256 + (pixel.y + 128) >> 8], 1);
+        atomicAdd(&histogram[256 + ((pixel.y + 128) >> 8)], 1);
     }
 }