--- old/src/hotspot/share/gc/g1/g1Arguments.hpp	2017-11-29 12:36:29.984673334 +0100
+++ new/src/hotspot/share/gc/g1/g1Arguments.hpp	2017-11-29 12:36:29.748663957 +0100
@@ -32,7 +32,7 @@
 class G1Arguments : public GCArguments {
 public:
   virtual void initialize_flags();
-  virtual void parse_verification_type(const char* type);
+  virtual bool parse_verification_type(const char* type);
   virtual size_t conservative_max_heap_alignment();
   virtual CollectedHeap* create_heap();
 };