--- old/src/hotspot/cpu/s390/gc/shared/barrierSetAssembler_s390.hpp	2018-10-31 23:12:43.740718890 +0100
+++ new/src/hotspot/cpu/s390/gc/shared/barrierSetAssembler_s390.hpp	2018-10-31 23:12:43.584720338 +0100
@@ -48,7 +48,7 @@
 
   virtual void barrier_stubs_init() {}
 
-  virtual bool needs_explicit_null_check(intptr_t offset);
+  virtual bool needs_explicit_null_check(intptr_t offset) const;
 };
 
 #endif // CPU_S390_GC_SHARED_BARRIERSETASSEMBLER_S390_HPP