diff --git a/otk/button.hh b/otk/button.hh
index 2d983fb3..5924e9b0 100644
--- a/otk/button.hh
+++ b/otk/button.hh
@@ -32,7 +32,7 @@ public:
   void buttonPressHandler(const XButtonEvent &e);
   void buttonReleaseHandler(const XButtonEvent &e);
 
-  void setStyle(Style *style);
+  virtual void setStyle(Style *style);
   
 private:
 
diff --git a/otk/widget.hh b/otk/widget.hh
index 80d269da..2e58cc99 100644
--- a/otk/widget.hh
+++ b/otk/widget.hh
@@ -97,7 +97,7 @@ public:
   void setDirection(Direction dir) { _direction = dir; }
 
   inline Style *getStyle(void) const { return _style; }
-  void setStyle(Style *style) { assert(style); _style = style; }
+  virtual void setStyle(Style *style) { assert(style); _style = style; }
 
   inline OtkEventDispatcher *getEventDispatcher(void)
   { return _event_dispatcher; }