diff --git a/download_manager.hpp b/download_manager.hpp
index edafaab..b53fc2b 100644
--- a/download_manager.hpp
+++ b/download_manager.hpp
@@ -3,6 +3,7 @@
 #include "xyz/openbmc_project/Common/TFTP/server.hpp"
 
 #include <sdbusplus/bus.hpp>
+#include <string>
 
 namespace phosphor
 {
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
 {
diff --git a/image_verify.hpp b/image_verify.hpp
index dcf904d..d52281c 100644
--- a/image_verify.hpp
+++ b/image_verify.hpp
@@ -9,6 +9,7 @@
 
 #include <experimental/filesystem>
 #include <set>
+#include <string>
 
 namespace phosphor
 {
diff --git a/item_updater.hpp b/item_updater.hpp
index 3f0530f..313c568 100644
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -6,6 +6,7 @@
 #include "xyz/openbmc_project/Collection/DeleteAll/server.hpp"
 
 #include <sdbusplus/server.hpp>
+#include <string>
 #include <xyz/openbmc_project/Association/Definitions/server.hpp>
 #include <xyz/openbmc_project/Common/FactoryReset/server.hpp>
 #include <xyz/openbmc_project/Control/FieldMode/server.hpp>
diff --git a/serialize.hpp b/serialize.hpp
index 08fc504..42a057b 100644
--- a/serialize.hpp
+++ b/serialize.hpp
@@ -5,6 +5,7 @@
 #include "version.hpp"
 
 #include <experimental/filesystem>
+#include <string>
 
 namespace phosphor
 {
diff --git a/version.hpp b/version.hpp
index f04cce2..e26e4eb 100644
--- a/version.hpp
+++ b/version.hpp
@@ -6,6 +6,7 @@
 
 #include <functional>
 #include <sdbusplus/bus.hpp>
+#include <string>
 
 namespace phosphor
 {
diff --git a/watch.hpp b/watch.hpp
index c63f765..27d2769 100644
--- a/watch.hpp
+++ b/watch.hpp
@@ -3,6 +3,7 @@
 #include <systemd/sd-event.h>
 
 #include <functional>
+#include <string>
 
 namespace phosphor
 {