diff --git a/src/hash.cc b/src/hash.cc
index ecfd6e46..567d8733 100644
--- a/src/hash.cc
+++ b/src/hash.cc
@@ -41,7 +41,7 @@ size_t hash_data(const char* input, size_t len)
     for (ptrdiff_t i = -nblocks; i; ++i)
     {
         uint32_t key;
-        memcpy(&key, blocks + 4*i, 4);
+        key = (blocks[4*i + 3] << 24) | (blocks[4*i + 2] << 16) | (blocks[4*i + 1] << 8) | blocks[4*i];
         key *= c1;
         key = rotl(key, 15);
         key *= c2;