diff --git a/src/metrics.h b/src/metrics.h
index b2cacd03a..2c5e7bd2c 100644
--- a/src/metrics.h
+++ b/src/metrics.h
@@ -8,7 +8,7 @@
 #include <string>
 
 struct AtomicCounter {
-    std::atomic<int> value;
+    std::atomic<uint64_t> value;
 
     AtomicCounter() : value {0} { }