diff --git a/gap/bytable.gi b/gap/bytable.gi
index a21edce..c4c47bc 100644
--- a/gap/bytable.gi
+++ b/gap/bytable.gi
@@ -344,7 +344,7 @@ InstallMethod(PrintObj, "for an element of magma by multiplication table",
 
 ## Property of a collection that its elements know their multiplication table
 InstallImmediateMethod(IsBuiltFromMultiplicationTable,
-              [IsCollection], 1,
+              IsCollection, 1,
               C -> HasMultiplicationTable(ElementsFamily(FamilyObj(C)))
 );