diff --git a/index.bs b/index.bs
index 0528cc5..9733bd4 100644
--- a/index.bs
+++ b/index.bs
@@ -5332,7 +5332,7 @@ created [=/request=] belongs to is [=transaction/aborted=] using the steps to
         1. Otherwise:
 
             1. Set |request|'s [=request/result=] to |result|.
-            1. Set |request|'s [=request/error=] to undefined.
+            1. Unset |request|'s [=request/error=].
             1. [=Fire a success event=] at |request|.
 
 1. Return |request|.