1 files changed, 1 insertions, 0 deletions
diff --git a/transform.h b/transform.h
index 2310d4be..74e770b2 100644
--- a/transform.h
+++ b/transform.h
@@ -10,6 +10,7 @@ namespace ledger {
 
 class transform_t {
  public:
+  virtual ~transform_t() {}
   virtual void execute(xml::document_t * document) = 0;
 };