diff --git a/include/Makefile.in b/include/Makefile.in
index 47a36ff91dc..0f780851927 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -323,6 +323,7 @@ SOURCES = \
 	inspectable.idl \
 	interactioncontext.h \
 	intshcut.h \
+	ip2string.h \
 	ipexport.h \
 	iphlpapi.h \
 	ipifcons.h \
diff --git a/include/ip2string.h b/include/ip2string.h
new file mode 100644
index 00000000000..6c96c8d76d6
--- /dev/null
+++ b/include/ip2string.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2019 Alex Henrie
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef __WINE_IP2STRING_H
+#define __WINE_IP2STRING_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+NTSTATUS WINAPI RtlIpv4StringToAddressA(const char *str, BOOLEAN strict, const char **terminator, IN_ADDR *address);
+NTSTATUS WINAPI RtlIpv4StringToAddressW(const WCHAR *str, BOOLEAN strict, const WCHAR **terminator, IN_ADDR *address);
+#define RtlIpv4StringToAddress WINELIB_NAME_AW(RtlIpv4StringToAddress)
+NTSTATUS WINAPI RtlIpv4StringToAddressExA(const char *str, BOOLEAN strict, IN_ADDR *address, USHORT *port);
+NTSTATUS WINAPI RtlIpv4StringToAddressExW(const WCHAR *str, BOOLEAN strict, IN_ADDR *address, USHORT *port);
+#define RtlIpv4StringToAddressEx WINELIB_NAME_AW(RtlIpv4StringToAddressEx)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif