diff --git a/src/book/mod.rs b/src/book/mod.rs
index 437b13d1..e8896e0a 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -223,7 +223,7 @@ impl MDBook {
 
             debug!("[*]: Writing to .gitignore");
 
-            writeln!(f, "{}", relative).expect("Could not write to file.");
+            writeln!(f, "/{}", relative).expect("Could not write to file.");
         }
     }