diff --git a/apps/opencs/view/doc/adjusterwidget.cpp b/apps/opencs/view/doc/adjusterwidget.cpp
index 24e37b0f5..910819700 100644
--- a/apps/opencs/view/doc/adjusterwidget.cpp
+++ b/apps/opencs/view/doc/adjusterwidget.cpp
@@ -2,6 +2,7 @@
 #include "adjusterwidget.hpp"
 
 #include <stdexcept>
+#include <string>
 
 #include <boost/filesystem.hpp>