--- old/src/hotspot/cpu/ppc/gc/shared/barrierSetAssembler_ppc.hpp	2018-10-31 23:12:43.313722855 +0100
+++ new/src/hotspot/cpu/ppc/gc/shared/barrierSetAssembler_ppc.hpp	2018-10-31 23:12:43.160724275 +0100
@@ -51,7 +51,7 @@
 
   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_PPC_GC_SHARED_BARRIERSETASSEMBLER_PPC_HPP