diff --git a/dtool/src/interrogatedb/extension.h b/dtool/src/interrogatedb/extension.h
index 9eeaffbae9..53f2e6241d 100644
--- a/dtool/src/interrogatedb/extension.h
+++ b/dtool/src/interrogatedb/extension.h
@@ -1,75 +1,75 @@
-// Filename: extension.h
-// Created by:  rdb (11Sep13)
-//
-////////////////////////////////////////////////////////////////////
-//
-// PANDA 3D SOFTWARE
-// Copyright (c) Carnegie Mellon University.  All rights reserved.
-//
-// All use of this software is subject to the terms of the revised BSD
-// license.  You should have received a copy of this license along
-// with this source code in a file named "LICENSE."
-//
-////////////////////////////////////////////////////////////////////
-
-#ifndef EXTENSION_H
-#define EXTENSION_H
-
-#include "dtoolbase.h"
-
-struct _object;
-typedef struct _object PyObject;
-
-////////////////////////////////////////////////////////////////////
-//       Class : ExtensionBase
-// Description : This is where all extensions should derive from.
-//               It defines the _self and _this members that can
-//               be used from the extension method.
-////////////////////////////////////////////////////////////////////
-template<class T>
-class EXPCL_DTOOLCONFIG ExtensionBase {
-public:
-  T * _this;
-  PyObject * _self;
-};
-
-////////////////////////////////////////////////////////////////////
-//       Class : Extension
-// Description : The default class template does not define any
-//               methods.  Classes that are extended should create
-//               a specialization of this class template.
-////////////////////////////////////////////////////////////////////
-template<class T>
-class EXPCL_DTOOLCONFIG Extension : public ExtensionBase<T> {
-};
-
-////////////////////////////////////////////////////////////////////
-//    Function : invoke_extension
-// Description : Creates a new extension object for the given
-//               pointer that can then be used to call extension
-//               methods, as follows:
-//               invoke_extension((MyClass) *ptr).method()
-////////////////////////////////////////////////////////////////////
-template<class T>
-inline Extension<T>
-invoke_extension(T *ptr, PyObject *self = NULL) {
-  Extension<T> ext;
-  ext._this = ptr;
-  ext._self = self;
-  return ext;
-}
-
-////////////////////////////////////////////////////////////////////
-//    Function : invoke_extension
-// Description : The const version of the above function.
-////////////////////////////////////////////////////////////////////
-template<class T>
-inline const Extension<T>
-invoke_extension(const T *ptr, PyObject *self = NULL) {
-  Extension<T> ext;
-  ext._this = (T *) ptr;
-  ext._self = self;
-  return ext;
-}
-
-#endif
+// Filename: extension.h
+// Created by:  rdb (11Sep13)
+//
+////////////////////////////////////////////////////////////////////
+//
+// PANDA 3D SOFTWARE
+// Copyright (c) Carnegie Mellon University.  All rights reserved.
+//
+// All use of this software is subject to the terms of the revised BSD
+// license.  You should have received a copy of this license along
+// with this source code in a file named "LICENSE."
+//
+////////////////////////////////////////////////////////////////////
+
+#ifndef EXTENSION_H
+#define EXTENSION_H
+
+#include "dtoolbase.h"
+
+struct _object;
+typedef struct _object PyObject;
+
+////////////////////////////////////////////////////////////////////
+//       Class : ExtensionBase
+// Description : This is where all extensions should derive from.
+//               It defines the _self and _this members that can
+//               be used from the extension method.
+////////////////////////////////////////////////////////////////////
+template<class T>
+class EXPCL_DTOOLCONFIG ExtensionBase {
+public:
+  T * _this;
+  PyObject * _self;
+};
+
+////////////////////////////////////////////////////////////////////
+//       Class : Extension
+// Description : The default class template does not define any
+//               methods.  Classes that are extended should create
+//               a specialization of this class template.
+////////////////////////////////////////////////////////////////////
+template<class T>
+class EXPCL_DTOOLCONFIG Extension : public ExtensionBase<T> {
+};
+
+////////////////////////////////////////////////////////////////////
+//    Function : invoke_extension
+// Description : Creates a new extension object for the given
+//               pointer that can then be used to call extension
+//               methods, as follows:
+//               invoke_extension((MyClass) *ptr).method()
+////////////////////////////////////////////////////////////////////
+template<class T>
+inline Extension<T>
+invoke_extension(T *ptr, PyObject *self = NULL) {
+  Extension<T> ext;
+  ext._this = ptr;
+  ext._self = self;
+  return ext;
+}
+
+////////////////////////////////////////////////////////////////////
+//    Function : invoke_extension
+// Description : The const version of the above function.
+////////////////////////////////////////////////////////////////////
+template<class T>
+inline const Extension<T>
+invoke_extension(const T *ptr, PyObject *self = NULL) {
+  Extension<T> ext;
+  ext._this = (T *) ptr;
+  ext._self = self;
+  return ext;
+}
+
+#endif