diff --git a/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp b/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
index 60fd52936a..66d005b933 100644
--- a/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
+++ b/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp
@@ -545,7 +545,7 @@ void tst_QDnsLookup::setNameserverLoopback()
     QByteArray data = dgram.data();
     QCOMPARE_GT(data.size(), HeaderSize);
 
-    quint8 opcode = (quint8(data.at(3)) >> 4) & 0xF;
+    quint8 opcode = (quint8(data.at(2)) >> 3) & 0xF;
     QCOMPARE(opcode, 0);        // standard query
 
     // send an NXDOMAIN reply to release the lookup thread