Index: src/GenPoly/SpecializeNew.cpp
===================================================================
--- src/GenPoly/SpecializeNew.cpp	(revision 9feb34b1fca12748b7d48737024da48e342f5c07)
+++ src/GenPoly/SpecializeNew.cpp	(revision c26bea2aa0f87b4b070349c5801adc32fb0d4cf9)
@@ -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