diff --git a/DCPlugin.pro b/DCPlugin.pro
index cf0b3f7..95d25db 100644
--- a/DCPlugin.pro
+++ b/DCPlugin.pro
@@ -30,6 +30,8 @@ contains( CONFIG, PTU5 ) {
     CONFIG += link_pkgconfig
     ARCH = PTU5
 
+    # NOTE: include contents of DCPlugin.pri. Also used by ATBQT.
+    # Add new files in DCPlugin.pri.
     include(DCPlugin.pri)
 
 }