diff --git a/src/doc/unstable-book/src/compiler-flags/profile_sample_use.md b/src/doc/unstable-book/src/compiler-flags/profile_sample_use.md
index ce894ce6ac7f1..2dd1f6f8e1a3a 100644
--- a/src/doc/unstable-book/src/compiler-flags/profile_sample_use.md
+++ b/src/doc/unstable-book/src/compiler-flags/profile_sample_use.md
@@ -1,4 +1,4 @@
-# `profile-sample-use
+# `profile-sample-use`
 
 ---