diff --git a/src/utils/color_cache.c b/src/utils/color_cache.c
index 046cb3b3..4746eeae 100644
--- a/src/utils/color_cache.c
+++ b/src/utils/color_cache.c
@@ -45,5 +45,5 @@ void VP8LColorCacheCopy(const VP8LColorCache* const src,
   assert(dst != NULL);
   assert(src->hash_bits_ == dst->hash_bits_);
   memcpy(dst->colors_, src->colors_,
-         (1 << dst->hash_bits_) * sizeof(*dst->colors_));
+         (size_t)(1 << dst->hash_bits_) * sizeof(*dst->colors_));
 }