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
 {