diff --git a/Model/IMLoading.m b/Model/IMLoading.m
index 9582de2e6..9bd174e15 100644
--- a/Model/IMLoading.m
+++ b/Model/IMLoading.m
@@ -1,4 +1,4 @@
-/*
+/* -*- C++ -*-
    IMLoading.m
 
    Copyright (C) 1996 Free Software Foundation, Inc.
diff --git a/Source/NSOpenPanel.m b/Source/NSOpenPanel.m
index b2d3ad978..a23515c61 100644
--- a/Source/NSOpenPanel.m
+++ b/Source/NSOpenPanel.m
@@ -1,4 +1,4 @@
-/* 
+/* -*- C++ -*-
    NSOpenPanel.m
 
    Standard open panel for opening files