diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index ad53c0f..5e27f0a 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -726,7 +726,7 @@
 # @ stub RtlIpv4StringToAddressA
 # @ stub RtlIpv4StringToAddressExA
 @ stdcall RtlIpv4StringToAddressExW(wstr long ptr ptr)
-# @ stub RtlIpv4StringToAddressW
+@ stdcall RtlIpv4StringToAddressW(wstr long ptr ptr)
 # @ stub RtlIpv6AddressToStringA
 # @ stub RtlIpv6AddressToStringExA
 # @ stub RtlIpv6AddressToStringExW
diff --git a/dlls/ntdll/rtl.c b/dlls/ntdll/rtl.c
index a1d71eb..8630dde 100644
--- a/dlls/ntdll/rtl.c
+++ b/dlls/ntdll/rtl.c
@@ -894,6 +894,15 @@
 }
 
 /***********************************************************************
+ * RtlIpv4StringToAddressW [NTDLL.@]
+ */
+NTSTATUS WINAPI RtlIpv4StringToAddressW(const WCHAR *str, BOOLEAN strict, const WCHAR **terminator, IN_ADDR *address)
+{
+    FIXME("(%s, %u, %p, %p): stub\n", debugstr_w(str), strict, terminator, address);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+/***********************************************************************
  * RtlIpv4AddressToStringExW [NTDLL.@]
  *
  * Convert the given ipv4 address and optional the port to a string
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index efbd13e..69f6059 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -1081,7 +1081,7 @@
 @ stub RtlIpv4StringToAddressA
 @ stub RtlIpv4StringToAddressExA
 @ stdcall RtlIpv4StringToAddressExW(wstr long ptr ptr) ntdll.RtlIpv4StringToAddressExW
-@ stub RtlIpv4StringToAddressW
+@ stdcall RtlIpv4StringToAddressW(wstr long ptr ptr) ntdll.RtlIpv4StringToAddressW
 @ stub RtlIpv6AddressToStringA
 @ stub RtlIpv6AddressToStringExA
 @ stub RtlIpv6AddressToStringExW