diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index 8a0d2a7f5cf..5229925ceed 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -1197,7 +1197,7 @@ pub fn append(&mut self, append: bool) -> &mut Self {
 
     /// Sets the option for truncating a previous file.
     ///
-    /// If a file is successfully opened with this option set it will truncate
+    /// If a file is successfully opened with this option set as true, it will truncate
     /// the file to 0 length if it already exists.
     ///
     /// The file must be opened with write access for truncate to work.