diff --git a/scribblings/manual.scrbl b/scribblings/manual.scrbl
index 3ac2226..63a5467 100644
--- a/scribblings/manual.scrbl
+++ b/scribblings/manual.scrbl
@@ -720,7 +720,7 @@ structure types can be made with plt.runtime.makeStructureType.  For example,
         3,          // required number of arguments
         0,          // number of automatically-filled fields
         false,      // OPTIONAL: the auto-v value
-        false,      // OPTIONAL: a guard procedure
+        false       // OPTIONAL: a guard procedure
         );
 }|