Index: src/GenPoly/SpecializeNew.cpp
===================================================================
--- src/GenPoly/SpecializeNew.cpp	(revision 9feb34b1fca12748b7d48737024da48e342f5c07)
+++ src/GenPoly/SpecializeNew.cpp	(revision a5aa5bf540d60862fa4c03609b41cf72df5835d0)
@@ -16,4 +16,5 @@
 #include "Specialize.h"
 
+#include "AST/Copy.hpp"                  // for deepCopy
 #include "AST/Inspect.hpp"               // for isIntrinsicCallExpr
 #include "AST/Pass.hpp"                  // for Pass