diff --git a/src/libutil/file-system.cc b/src/libutil/file-system.cc
index 0f86dd2b1..ad8cef38c 100644
--- a/src/libutil/file-system.cc
+++ b/src/libutil/file-system.cc
@@ -625,7 +625,7 @@ std::pair<AutoCloseFD, Path> createTempFile(const Path & prefix)
 Path makeTempPath(const Path & root, const Path & suffix)
 {
     // start the counter at a random value to minimize issues with preexisting temp paths
-    static std::atomic_uint_fast32_t counter(std::random_device{}());
+    static std::atomic<uint32_t> counter(std::random_device{}());
     auto tmpRoot = canonPath(root.empty() ? defaultTempDir() : root, true);
     return fmt("%1%/%2%-%3%-%4%", tmpRoot, suffix, getpid(), counter.fetch_add(1, std::memory_order_relaxed));
 }