diff --git a/include/Makefile.in b/include/Makefile.in
index 1c721d2717d..3a76a28699e 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -179,6 +179,7 @@ WINDOWS_INCLUDES = \
 	rpcnterr.h \
 	rpcproxy.h \
 	sddl.h \
+	secext.h \
 	setupapi.h \
 	shellapi.h \
 	shlguid.h \
diff --git a/include/secext.h b/include/secext.h
new file mode 100644
index 00000000000..a83ac83c9c4
--- /dev/null
+++ b/include/secext.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2004 Mike McCormack
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __SECEXT_H__
+#define __SECEXT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum
+{
+    NameUnknown = 0,
+    NameFullyQualifiedDN = 1,
+    NameSamCompatible = 2,
+    NameDisplay = 3,
+    NameUniqueId = 6,
+    NameCanonical = 7,
+    NameUserPrincipal = 8,
+    NameCanonicalEx = 9,
+    NameServicePrincipal = 10,
+    NameDnsDomain = 12
+} EXTENDED_NAME_FORMAT, *PEXTENDED_NAME_FORMAT;
+
+BOOLEAN WINAPI GetComputerObjectNameA( EXTENDED_NAME_FORMAT, LPSTR, PULONG );
+BOOLEAN WINAPI GetComputerObjectNameW( EXTENDED_NAME_FORMAT, LPWSTR, PULONG );
+#define        GetComputerObjectName WINELIB_NAME_AW(GetComputerObjectName)
+
+BOOLEAN WINAPI GetUserNameExA( EXTENDED_NAME_FORMAT, LPSTR, PULONG );
+BOOLEAN WINAPI GetUserNameExW( EXTENDED_NAME_FORMAT, LPWSTR, PULONG );
+#define        GetUserNameEx WINELIB_NAME_AW(GetUserNameEx)
+
+BOOLEAN WINAPI TranslateNameA( LPCSTR, EXTENDED_NAME_FORMAT, EXTENDED_NAME_FORMAT, LPSTR, PULONG);
+BOOLEAN WINAPI TranslateNameW( LPCWSTR, EXTENDED_NAME_FORMAT, EXTENDED_NAME_FORMAT, LPWSTR, PULONG);
+#define        TranslateName WINELIB_NAME_AW(TranslateName)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __SECEXT_H__ */