diff --git a/gap/classes.gd b/gap/classes.gd
index 9ea2100..87a3520 100644
--- a/gap/classes.gd
+++ b/gap/classes.gd
@@ -13,7 +13,7 @@
 ##  -------------------------------------------------------------------------
 
 DeclareProperty( "IsAssociative", IsLoop );
-DeclareProperty( "IsCommutative", IsQuasigroup );
+#DeclareProperty( "IsCommutative", IsQuasigroup ); # Already covered by GAP
 DeclareProperty( "IsPowerAssociative", IsQuasigroup );
 DeclareProperty( "IsDiassociative", IsQuasigroup );