diff --git a/src/libraries/JANA/Topology/JArrowMetrics.h b/src/libraries/JANA/Topology/JArrowMetrics.h
index fde19d6fc..12e783d79 100644
--- a/src/libraries/JANA/Topology/JArrowMetrics.h
+++ b/src/libraries/JANA/Topology/JArrowMetrics.h
@@ -5,6 +5,7 @@
 #pragma once
 #include <mutex>
 #include <chrono>
+#include <string>
 
 class JArrowMetrics {