diff --git a/src/slic3r/GUI/DeviceCore/DevLamp.h b/src/slic3r/GUI/DeviceCore/DevLamp.h
index 437d7cf896..205563c03d 100644
--- a/src/slic3r/GUI/DeviceCore/DevLamp.h
+++ b/src/slic3r/GUI/DeviceCore/DevLamp.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <string>
+
 namespace Slic3r
 {