diff --git a/src/tools/miri/src/concurrency/vector_clock.rs b/src/tools/miri/src/concurrency/vector_clock.rs
index a6e67ef8699..fa93c9e00b1 100644
--- a/src/tools/miri/src/concurrency/vector_clock.rs
+++ b/src/tools/miri/src/concurrency/vector_clock.rs
@@ -9,7 +9,7 @@
 
 /// A vector clock index, this is associated with a thread id
 /// but in some cases one vector index may be shared with
-/// multiple thread ids if it safe to do so.
+/// multiple thread ids if it's safe to do so.
 #[derive(Clone, Copy, Debug, PartialOrd, Ord, PartialEq, Eq, Hash)]
 pub struct VectorIdx(u32);