diff --git a/gap/quasigroups.gi b/gap/quasigroups.gi
index 485d1aa..8a3d276 100644
--- a/gap/quasigroups.gi
+++ b/gap/quasigroups.gi
@@ -866,6 +866,11 @@ InstallMethod( Opposite, "for magma",
     M -> ConstructorFromTable(M)( TransposedMat( MultiplicationTable( M ) ) )
 );
 
+InstallMethod( Opposite, "for magma",
+    [ IsMagma and HasCayleyTable], # mult table easy if Cayley table there
+    M -> ConstructorFromTable(M)( TransposedMat( MultiplicationTable( M ) ) )
+);
+
 #############################################################################
 ##  DISPLAYING QUASIGROUPS AND LOOPS
 ##  -------------------------------------------------------------------------