diff --git a/include/wabt/common.h b/include/wabt/common.h
--- a/include/wabt/common.h
+++ b/include/wabt/common.h
@@ -18,7 +18,6 @@
 #define WABT_COMMON_H_
 
 #include <algorithm>
-#include <bit>
 #include <cassert>
 #include <cstdarg>
 #include <cstddef>
@@ -162,9 +161,12 @@ struct v128 {
 namespace wabt {
 
 template <typename Dst, typename Src>
-Dst WABT_VECTORCALL Bitcast(const Src& value) {
-  return std::bit_cast<Dst>(value);
-}
+Dst WABT_VECTORCALL Bitcast(Src&& value) {
+  static_assert(sizeof(Src) == sizeof(Dst), "Bitcast sizes must match.");
+  Dst result;
+  memcpy(&result, &value, sizeof(result));
+  return result;
+ }
 
 template <typename T>
 void ZeroMemory(T& v) {