diff --git a/polly/lib/Transform/ScheduleOptimizer.cpp b/polly/lib/Transform/ScheduleOptimizer.cpp
index a91304c..17538a3 100644
--- a/polly/lib/Transform/ScheduleOptimizer.cpp
+++ b/polly/lib/Transform/ScheduleOptimizer.cpp
@@ -183,7 +183,9 @@
 
   static isl_union_map *getScheduleMap(isl_schedule *Schedule);
 
-  bool doFinalization() {
+  using llvm::Pass::doFinalization;
+
+  virtual bool doFinalization() {
     isl_schedule_free(LastSchedule);
     LastSchedule = NULL;
     return true;