diff --git a/ve/velib.h b/ve/velib.h
index ffc25766b..4e85fa4bc 100755
--- a/ve/velib.h
+++ b/ve/velib.h
@@ -744,6 +744,7 @@ public:
 	virtual TRectype & operator =(const char * r); 
 	virtual void zero(const char * fieldname);
 	virtual void zero(char c = '\0') { TMultiple_rectype::zero(c); }
+  void sort_rows(const char * key);
 
 	int physical_rows() const { return	body().rows(); } 
 	int rows() const { return physical_rows() + ((_sconto != NULL) ? 1 : 0) + ((_esenzione != NULL) ? 1 : 0); }