diff --git a/lib/Transforms/Scalar/PredicateSimplifier.cpp b/lib/Transforms/Scalar/PredicateSimplifier.cpp
index 16cc20c06a8..cb4b2b39c1b 100644
--- a/lib/Transforms/Scalar/PredicateSimplifier.cpp
+++ b/lib/Transforms/Scalar/PredicateSimplifier.cpp
@@ -247,6 +247,7 @@ namespace {
     private:
 #ifndef NDEBUG
     public:
+      virtual ~Node() {}
       virtual void dump() const {
         dump(*cerr.stream());
       }
@@ -638,6 +639,7 @@ namespace {
     }
 
 #ifndef NDEBUG
+    virtual ~InequalityGraph() {}
     virtual void dump() {
       dump(*cerr.stream());
     }