diff --git a/include/fast_div.hpp b/include/fast_div.hpp
index 3adab8b6..8317f2d8 100644
--- a/include/fast_div.hpp
+++ b/include/fast_div.hpp
@@ -56,7 +56,7 @@ ALWAYS_INLINE uint64_t fast_div_240(uint64_t x)
   return __umulh(x, 9838263505978427529ull) >> 7;
 #elif defined(HAVE_INT128_T)
   using namespace primecount;
-  return ((x * uint128_t(9838263505978427529ull)) >> 64) >> 7;
+  return uint64_t((x * uint128_t(9838263505978427529ull)) >> 64) >> 7;
 #else
   return x / 240;
 #endif