diff --git a/src/cc/cclib.cpp b/src/cc/cclib.cpp
index 364953148..e8b4a32b2 100644
--- a/src/cc/cclib.cpp
+++ b/src/cc/cclib.cpp
@@ -1,3 +1,4 @@
+// Copyright © 2019-2020 The Hush Developers
 /******************************************************************************
  * Copyright © 2014-2019 The SuperNET Developers.                             *
  *                                                                            *
@@ -34,6 +35,9 @@
 #define EVAL_ROGUE 17
 std::string MYCCLIBNAME = (char *)"rogue";
 
+extern const uint32_t z2zForkHeight;
+
+
 
 #elif BUILD_CUSTOMCC
 #include "customcc.h"