diff --git a/gap/structure.gi b/gap/structure.gi
index 47b6118..dcaf728 100644
--- a/gap/structure.gi
+++ b/gap/structure.gi
@@ -260,7 +260,7 @@ end;
 
 InstallMethod(String, "for a left quasigroup",
               [IsLeftQuasigroup],
-              Q -> Concatenation(LeftObjString@(Q), "(...)");
+              Q -> Concatenation(LeftObjString@(Q), "(...)"));
 
 InstallMethod(String, "for a left quasigroup with generators",
               [IsLeftQuasigroup and HasGeneratorsOfLeftQuasigroup],
@@ -275,7 +275,7 @@ InstallMethod(String, "for a left quasigroup with multiplication table",
 
 InstallMethod(String, "for a right quasigroup",
               [IsRightQuasigroup],
-              Q -> Concatenation(RightObjString@(Q), "(...)");
+              Q -> Concatenation(RightObjString@(Q), "(...)"));
 
 InstallMethod(String, "for a right quasigroup with generators",
               [IsRightQuasigroup and HasGeneratorsOfRightQuasigroup],