--- old/src/hotspot/cpu/arm/gc/shared/barrierSetAssembler_arm.hpp	2018-10-31 23:12:42.882726857 +0100
+++ new/src/hotspot/cpu/arm/gc/shared/barrierSetAssembler_arm.hpp	2018-10-31 23:12:42.722728342 +0100
@@ -73,7 +73,7 @@
     // Default implementation does not need to do anything.
   }
 
-  virtual bool needs_explicit_null_check(intptr_t offset);
+  virtual bool needs_explicit_null_check(intptr_t offset) const;
 };
 
 #endif // CPU_ARM_GC_SHARED_BARRIERSETASSEMBLER_ARM_HPP