diff --git a/polly/include/polly/CodeGen/BlockGenerators.h b/polly/include/polly/CodeGen/BlockGenerators.h
index f382d763f75b..c2aa42fd8922 100644
--- a/polly/include/polly/CodeGen/BlockGenerators.h
+++ b/polly/include/polly/CodeGen/BlockGenerators.h
@@ -161,7 +161,7 @@ public:
   void finalizeSCoP(Scop &S);
 
   /// @brief An empty destructor
-  virtual ~BlockGenerator() = default;
+  virtual ~BlockGenerator(){};
 
   BlockGenerator(const BlockGenerator &) = default;
 
@@ -687,7 +687,7 @@ public:
   /// @param BlockGen A generator for basic blocks.
   RegionGenerator(BlockGenerator &BlockGen) : BlockGenerator(BlockGen) {}
 
-  virtual ~RegionGenerator() = default;
+  virtual ~RegionGenerator(){};
 
   /// @brief Copy the region statement @p Stmt.
   ///