diff --git a/alib2algo/src/tree/transform/FirstChildNextSibling.h b/alib2algo/src/tree/transform/FirstChildNextSibling.h
index 0c36eb73835b11214cae0ea5e75dcb1d055ebbfb..79fdb599d87371af17789b76e756b91ab4955332 100644
--- a/alib2algo/src/tree/transform/FirstChildNextSibling.h
+++ b/alib2algo/src/tree/transform/FirstChildNextSibling.h
@@ -23,7 +23,7 @@ public:
 
 private:
 	template < class SymbolType >
-	static ext::tree < common::ranked_symbol < SymbolType > > transformInternal ( const ext::vector < ext::tree < SymbolType > > & tree, const SymbolType & terminalSymbol );
+	static ext::tree < common::ranked_symbol < SymbolType > > transformInternal ( const ext::vector < ext::tree < SymbolType > > & treeList, const SymbolType & terminalSymbol );
 };
 
 template < class SymbolType >