diff --git a/crates/turbo-tasks-memory/src/count_hash_set.rs b/crates/turbo-tasks-memory/src/count_hash_set.rs
index 04d6c7d5600cb..5e72c31d43524 100644
--- a/crates/turbo-tasks-memory/src/count_hash_set.rs
+++ b/crates/turbo-tasks-memory/src/count_hash_set.rs
@@ -301,7 +301,7 @@ impl<'a, T> Iterator for CountHashSetIter<'a, T> {
     type Item = &'a T;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.count -= 1;
+        self.count = self.count.saturating_sub(1);
         self.inner.next()
     }