diff --git a/interface/collpane.h b/interface/collpane.h
index c60fdc0273..aee05b57dc 100644
--- a/interface/collpane.h
+++ b/interface/collpane.h
@@ -101,6 +101,11 @@ public:
 class wxCollapsiblePane : public wxControl
 {
 public:
+    /**
+        Default constructor.
+    */
+    wxCollapsiblePane();
+    
     /**
         Initializes the object and calls Create() with all the parameters.
     */