Index: src/InitTweak/FixInit.cc
===================================================================
--- src/InitTweak/FixInit.cc	(revision 7abee383f06a7fe5690784e7676edcdf68ff7660)
+++ src/InitTweak/FixInit.cc	(revision 23f99e1d5411939dbd45a0bbb1412b814c387ffa)
@@ -72,5 +72,5 @@
 		};
 
-		struct InsertImplicitCalls : public WithTypeSubstitution {
+		struct InsertImplicitCalls : public WithConstTypeSubstitution {
 			/// wrap function application expressions as ImplicitCopyCtorExpr nodes so that it is easy to identify which
 			/// function calls need their parameters to be copy constructed
@@ -187,5 +187,5 @@
 		};
 
-		class FixCopyCtors final : public WithStmtsToAdd, public WithShortCircuiting, public WithVisitorRef<FixCopyCtors>, public WithTypeSubstitution {
+		class FixCopyCtors final : public WithStmtsToAdd, public WithShortCircuiting, public WithVisitorRef<FixCopyCtors>, public WithConstTypeSubstitution {
 		  public:
 			FixCopyCtors( UnqCount & unqCount ) : unqCount( unqCount ){}