diff --git a/iteration.Rmd b/iteration.Rmd
index ffe87c0..fb93c6b 100644
--- a/iteration.Rmd
+++ b/iteration.Rmd
@@ -658,7 +658,7 @@ str(safe_log(10))
 str(safe_log("a"))
 ```
 
-When the function succeeds the `result` element contains the result and the `error` element is `NULL`. When the function fails, the `result` element is `NULL` and the `error` element contains an error object.
+When the function succeeds, the `result` element contains the result and the `error` element is `NULL`. When the function fails, the `result` element is `NULL` and the `error` element contains an error object.
 
 `safely()` is designed to work with map: