diff --git a/generator/CPP11/include_v2.0/msgmap.hpp b/generator/CPP11/include_v2.0/msgmap.hpp
index a3956aa20..b4787b84a 100644
--- a/generator/CPP11/include_v2.0/msgmap.hpp
+++ b/generator/CPP11/include_v2.0/msgmap.hpp
@@ -6,6 +6,13 @@
 #include <sys/endian.h>
 #elif __APPLE__
 #include <machine/endian.h>
+#include <libkern/OSByteOrder.h>
+#define htole16(x) OSSwapHostToLittleInt16(x)
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+#define htole32(x) OSSwapHostToLittleInt32(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+#define htole64(x) OSSwapHostToLittleInt64(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
 #else
 #include <endian.h>
 #endif