diff --git a/reactos/dll/win32/ws2_32/misc/ns.c b/reactos/dll/win32/ws2_32/misc/ns.c
index 1db254dee9b..b95b2af53ee 100644
--- a/reactos/dll/win32/ws2_32/misc/ns.c
+++ b/reactos/dll/win32/ws2_32/misc/ns.c
@@ -1298,6 +1298,12 @@ inet_addr(IN  CONST CHAR FAR* cp)
 
     p = (PCHAR)cp;
 
+    if (!p)
+    {
+        WSASetLastError(WSAEFAULT);
+        return INADDR_NONE;
+    }
+
     if (strlen(p) == 0)
         return INADDR_NONE;