diff --git a/gap/structure.gi b/gap/structure.gi
index 9ace9cd..7cc497a 100644
--- a/gap/structure.gi
+++ b/gap/structure.gi
@@ -2,7 +2,7 @@
 
 ## Create structures with generators
 InstallGlobalFunction(CloneOfTypeByGenerators,
-  function(cat, fam, gens, genAttrib, tableCstr),
+  function(cat, fam, gens, genAttrib, tableCstr)
     local M;
     if not(IsEmpty(gens) or IsIdenticalObj(FamilyObj(gens), fam)) then
       Error("<fam> and family of <gens> do not match");