diff --git a/support/tools/TableGen/TableGenBackend.h b/support/tools/TableGen/TableGenBackend.h
index ae71d2c66bc..bd132039b86 100644
--- a/support/tools/TableGen/TableGenBackend.h
+++ b/support/tools/TableGen/TableGenBackend.h
@@ -14,6 +14,7 @@ class Record;
 class RecordKeeper;
 
 struct TableGenBackend {
+  virtual ~TableGenBackend() {}
 
   // run - All TableGen backends should implement the run method, which should
   // be the main entry point.
diff --git a/utils/TableGen/TableGenBackend.h b/utils/TableGen/TableGenBackend.h
index ae71d2c66bc..bd132039b86 100644
--- a/utils/TableGen/TableGenBackend.h
+++ b/utils/TableGen/TableGenBackend.h
@@ -14,6 +14,7 @@ class Record;
 class RecordKeeper;
 
 struct TableGenBackend {
+  virtual ~TableGenBackend() {}
 
   // run - All TableGen backends should implement the run method, which should
   // be the main entry point.