Index: libs/libmyth/output.h
===================================================================
--- libs/libmyth/output.h	(revision 22953)
+++ libs/libmyth/output.h	(working copy)
@@ -65,7 +65,7 @@
     const int &precision() const { return prec; }
     const int &channels() const { return chan; }
 
-    virtual OutputEvent *clone() { return new OutputEvent(*this); };
+    virtual OutputEvent *clone() const { return new OutputEvent(*this); };
 
 private:
     QString *error_msg;