diff --git a/src/ce_main.pas b/src/ce_main.pas
index 17a84063..cd6f7128 100644
--- a/src/ce_main.pas
+++ b/src/ce_main.pas
@@ -1426,7 +1426,7 @@ end;
 procedure TCEMainForm.actFileAddToProjExecute(Sender: TObject);
 begin
   if fDoc = nil then exit;
-  if fDoc.isProjectSource then exit; // TODO: rename this ambiguous property name to 'isProjectFile'
+  if fDoc.isProjectFile then exit;
   if fProjectInterface = nil then exit;
   //
   if fProjectInterface.getFormat = pfNative then
diff --git a/src/ce_synmemo.pas b/src/ce_synmemo.pas
index 2df1bfaf..4fbd78e7 100644
--- a/src/ce_synmemo.pas
+++ b/src/ce_synmemo.pas
@@ -159,7 +159,7 @@ type
     //
     property syncroEdit: TSynPluginSyncroEdit read fSyncEdit;
     property isDSource: boolean read fIsDSource;
-    property isProjectSource: boolean read fIsConfig;
+    property isProjectFile: boolean read fIsConfig; // warning: never set !
     property isTemporary: boolean read getIfTemp;
     property TextView;
     //