diff --git a/reactos/dll/win32/wshtcpip/wshtcpip.c b/reactos/dll/win32/wshtcpip/wshtcpip.c
index 0aeab38d281..47423f17ffb 100644
--- a/reactos/dll/win32/wshtcpip/wshtcpip.c
+++ b/reactos/dll/win32/wshtcpip/wshtcpip.c
@@ -355,7 +355,7 @@ WSHIoctl(
 
     DPRINT1("Ioctl: Unknown IOCTL code: %d\n", IoControlCode);
 
-    return NO_ERROR;
+    return WSAEINVAL;
 }