diff --git a/src/preferences/filetypes/PreferredAppMenu.cpp b/src/preferences/filetypes/PreferredAppMenu.cpp
index a25d8ecac6..81548f8409 100644
--- a/src/preferences/filetypes/PreferredAppMenu.cpp
+++ b/src/preferences/filetypes/PreferredAppMenu.cpp
@@ -13,6 +13,7 @@
 #include <MenuItem.h>
 #include <Mime.h>
 #include <NodeInfo.h>
+#include <String.h>
 
 #include <stdio.h>
 #include <string.h>