diff --git a/reactos/dll/win32/iphlpapi/resinfo_reactos.c b/reactos/dll/win32/iphlpapi/resinfo_reactos.c
index a9516582038..a4625efb805 100644
--- a/reactos/dll/win32/iphlpapi/resinfo_reactos.c
+++ b/reactos/dll/win32/iphlpapi/resinfo_reactos.c
@@ -229,7 +229,7 @@ PIPHLP_RES_INFO getResInfo() {
     Str = QueryRegistryValueString( hKey, L"NameServer" );
 
     /* If NameServer is empty */
-    if (*Str == L'\0')
+    if (!Str || *Str == L'\0')
     {
         /* Then use DhcpNameServer */
         Str = QueryRegistryValueString( hKey, L"DhcpNameServer" );