--- a/xsd/xsd.cxx
+++ b/xsd/xsd.cxx
@@ -15,7 +15,7 @@
 
 #include <xsd-frontend/parser.hxx>
 #include <xsd-frontend/transformations/anonymous.hxx>
-#include <xsd-frontend/transformations/enum-synthesis.cxx>
+#include <xsd-frontend/transformations/enum-synthesis.hxx>
 #include <xsd-frontend/transformations/restriction.hxx>
 #include <xsd-frontend/transformations/schema-per-type.hxx>
 #include <xsd-frontend/transformations/simplifier.hxx>