diff --git a/src/textbuf_gui.h b/src/textbuf_gui.h
--- a/src/textbuf_gui.h
+++ b/src/textbuf_gui.h
@@ -22,6 +22,7 @@ enum QueryStringFlags {
 	QSF_ACCEPT_UNCHANGED = 0x01, ///< return success even when the text didn't change
 	QSF_ENABLE_DEFAULT   = 0x02, ///< enable the 'Default' button ("\0" is returned)
 	QSF_LEN_IN_CHARS     = 0x04, ///< the length of the string is counted in characters
+	QSF_PASSWORD         = 0x08, ///< password entry box, show warning about password security
 };
 
 DECLARE_ENUM_AS_BIT_SET(QueryStringFlags)