diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index c3b4e315ce..1601d08e42 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -2035,6 +2035,11 @@ public:
         return true;
     }
 
+    // Give it a virtual dtor just to suppress gcc warnings about a class with
+    // virtual methods but non-virtual dtor -- even if this is completely safe
+    // here as we never use the objects of this class polymorphically.
+    virtual ~ValidationTraverserBase() { }
+
 protected:
     // Called for each child, validator is guaranteed to be non-NULL.
     virtual bool OnDo(wxValidator* validator) = 0;