diff --git a/osx/fib-table-controller.h b/osx/fib-table-controller.h
index 1dd074f..65d60f7 100644
--- a/osx/fib-table-controller.h
+++ b/osx/fib-table-controller.h
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/fib-table-controller.mm b/osx/fib-table-controller.mm
index 2f8e96e..04821d0 100644
--- a/osx/fib-table-controller.mm
+++ b/osx/fib-table-controller.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/main.mm b/osx/main.mm
index c306608..e9b10aa 100644
--- a/osx/main.mm
+++ b/osx/main.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/menu-delegate.h b/osx/menu-delegate.h
index 27ced8c..03b371e 100644
--- a/osx/menu-delegate.h
+++ b/osx/menu-delegate.h
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/menu-delegate.mm b/osx/menu-delegate.mm
index c47e0b9..11cbfc9 100644
--- a/osx/menu-delegate.mm
+++ b/osx/menu-delegate.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: obj; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/ndnd-status-operation.h b/osx/ndnd-status-operation.h
index 3f440a9..8970288 100644
--- a/osx/ndnd-status-operation.h
+++ b/osx/ndnd-status-operation.h
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/ndnd-status-operation.mm b/osx/ndnd-status-operation.mm
index ab0f303..8bd5ac9 100644
--- a/osx/ndnd-status-operation.mm
+++ b/osx/ndnd-status-operation.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/preference-delegate.h b/osx/preference-delegate.h
index fdc48bd..03022bd 100644
--- a/osx/preference-delegate.h
+++ b/osx/preference-delegate.h
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/preference-delegate.mm b/osx/preference-delegate.mm
index b19e369..113bf0b 100644
--- a/osx/preference-delegate.mm
+++ b/osx/preference-delegate.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/sparkle-auto-update.h b/osx/sparkle-auto-update.h
index 88f8c66..78c793f 100644
--- a/osx/sparkle-auto-update.h
+++ b/osx/sparkle-auto-update.h
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *
diff --git a/osx/sparkle-auto-update.mm b/osx/sparkle-auto-update.mm
index a515a79..a3a9b20 100644
--- a/osx/sparkle-auto-update.mm
+++ b/osx/sparkle-auto-update.mm
@@ -1,4 +1,4 @@
-/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/* -*- Mode: objc; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
 /*
  * @copyright See LICENCE for copyright and license information.
  *