diff --git a/src/doc/book/closures.md b/src/doc/book/closures.md
index d332cac7d8d16..3ed85c1a90b69 100644
--- a/src/doc/book/closures.md
+++ b/src/doc/book/closures.md
@@ -340,7 +340,7 @@ fn call_with_ref<'a, F>(some_closure:F) -> i32
     where F: Fn(&'a i32) -> i32 {
 ```
 
-However this presents a problem with in our case. When you specify the explicit
+However this presents a problem in our case. When you specify the explicit
 lifetime on a function it binds that lifetime to the *entire* scope of the function
 instead of just the invocation scope of our closure. This means that the borrow checker
 will see a mutable reference in the same lifetime as our immutable reference and fail