diff --git a/mozilla/widget/public/Makefile.in b/mozilla/widget/public/Makefile.in
index 6dd929f03dd..a12bdfc270f 100644
--- a/mozilla/widget/public/Makefile.in
+++ b/mozilla/widget/public/Makefile.in
@@ -66,6 +66,7 @@ EXPORTS		= \
 		nsIFontSizeIterator.h \
 		nsIFontRetrieverService.h \
 		nsIContextMenu.h \
+		nsIDragSessionGTK.h \
 		$(NULL)
 
 XPIDLSRCS	= \
diff --git a/mozilla/widget/public/nsIDragSessionGTK.h b/mozilla/widget/public/nsIDragSessionGTK.h
new file mode 100644
index 00000000000..bfe4a368b4c
--- /dev/null
+++ b/mozilla/widget/public/nsIDragSessionGTK.h
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Christopher Blizzard
+ * <blizzard@mozilla.org>.  Portions created by Christopher Blizzard
+ * are Copyright (C) 1998 Christopher Blizzard. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Christopher Blizzard <blizzard@mozilla.org>
+*/
+
+#ifndef nsIDragSessionGTK_h_
+#define nsIDragSessionGTK_h_
+
+#include "nsISupports.h"
+
+#include <gtk/gtk.h>
+
+#define NS_IDRAGSESSIONGTK_IID \
+{ 0xa6b49c42, 0x1dd1, 0x11b2, { 0xb2, 0xdf, 0xc1, 0xd6, 0x1d, 0x67, 0x45, 0xcf } };
+
+class nsIDragSessionGTK : public nsISupports {
+ public:
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDRAGSESSIONGTK_IID)
+
+  NS_IMETHOD SetLastDragContext(GdkDragContext *aContext) = 0;
+  NS_IMETHOD SetDragData       (GtkWidget      *aWidget,
+                                GdkDragContext *aContext,
+                                gint            x,
+                                gint            y,
+                                guint           time) = 0;
+
+};
+
+#endif /* nsIDragSessionGTK_h_ */