1 files changed, 4 insertions, 0 deletions
diff --git a/src/network/kernel/qhostinfo.cpp b/src/network/kernel/qhostinfo.cpp
index 9be6abced0..9e4a3fae83 100644
--- a/src/network/kernel/qhostinfo.cpp
+++ b/src/network/kernel/qhostinfo.cpp
@@ -225,6 +225,10 @@ static int nextId()
 */
 int QHostInfo::lookupHost(const QString &name, QT7_ONLY(const) QObject *receiver, const char *member)
 {
+    if (!receiver || !member) {
+        qWarning("QHostInfo::lookupHost: both the receiver and the member to invoke must be non-null");
+        return -1;
+    }
     return QHostInfo::lookupHostImpl(name, receiver, nullptr, member);
 }