diff --git a/image_manager.hpp b/image_manager.hpp
index 8498c77..4f2b206 100644
--- a/image_manager.hpp
+++ b/image_manager.hpp
@@ -2,6 +2,7 @@
 #include "version.hpp"
 
 #include <sdbusplus/server.hpp>
+#include <string>
 
 namespace phosphor
 {