--- old/src/hotspot/share/opto/classes.cpp	2019-10-01 18:15:26.963333585 +0200
+++ new/src/hotspot/share/opto/classes.cpp	2019-10-01 18:15:26.630322504 +0200
@@ -48,9 +48,6 @@
 #include "opto/subnode.hpp"
 #include "opto/vectornode.hpp"
 #include "utilities/macros.hpp"
-#if INCLUDE_ZGC
-#include "gc/z/c2/zBarrierSetC2.hpp"
-#endif
 #if INCLUDE_SHENANDOAHGC
 #include "gc/shenandoah/c2/shenandoahBarrierSetC2.hpp"
 #endif