--- a/src/hotspot/share/gc/shared/genCollectedHeap.cpp	Fri May 04 09:29:14 2018 +0200
+++ b/src/hotspot/share/gc/shared/genCollectedHeap.cpp	Fri May 04 11:41:35 2018 +0200
@@ -30,6 +30,7 @@
 #include "classfile/vmSymbols.hpp"
 #include "code/codeCache.hpp"
 #include "code/icBuffer.hpp"
+#include "gc/serial/defNewGeneration.hpp"
 #include "gc/shared/adaptiveSizePolicy.hpp"
 #include "gc/shared/cardTableBarrierSet.hpp"
 #include "gc/shared/cardTableRS.hpp"
@@ -1250,12 +1251,14 @@
   return (GenCollectedHeap*) heap;
 }
 
+#if INCLUDE_SERIALGC
 void GenCollectedHeap::prepare_for_compaction() {
   // Start by compacting into same gen.
   CompactPoint cp(_old_gen);
   _old_gen->prepare_for_compaction(&cp);
   _young_gen->prepare_for_compaction(&cp);
 }
+#endif // INCLUDE_SERIALGC
 
 void GenCollectedHeap::verify(VerifyOption option /* ignored */) {
   log_debug(gc, verify)("%s", _old_gen->name());