diff --git a/src/util/ByteUtil.h b/src/util/ByteUtil.h
index 6e2f207..52de8f4 100644
--- a/src/util/ByteUtil.h
+++ b/src/util/ByteUtil.h
@@ -30,7 +30,11 @@ namespace Feather
     inline int64_t ReverseBytes(int64_t n) { return int64_t(ReverseBytes(uint64_t(n))); }
 
     template <typename J, typename T>
-    inline T ReverseBytesBitcast(T n) { return std::bit_cast<T>(ReverseBytes(std::bit_cast<J>(n))); }
+    inline T ReverseBytesBitcast(T n)
+    {
+        static_assert(sizeof(T) == sizeof(J));
+        return std::bit_cast<T>(ReverseBytes(std::bit_cast<J>(n)));
+    }
 
     inline float  ReverseBytes(float n)  { return ReverseBytesBitcast<uint32_t>(n); }
     inline double ReverseBytes(double n) { return ReverseBytesBitcast<uint64_t>(n); }