diff --git a/src/jdk.net/macosx/native/libextnet/MacOSXSocketOptions.c b/src/jdk.net/macosx/native/libextnet/MacOSXSocketOptions.c
index 296a4fd7307..762aa54cb05 100644
--- a/src/jdk.net/macosx/native/libextnet/MacOSXSocketOptions.c
+++ b/src/jdk.net/macosx/native/libextnet/MacOSXSocketOptions.c
@@ -38,6 +38,10 @@
 #define IP_DONTFRAG             28
 #endif
 
+#ifndef IPV6_DONTFRAG
+#define IPV6_DONTFRAG           62
+#endif
+
 #include "jni_util.h"
 
 /*