diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp
index a847ff16a8d..a21fa23fb0f 100644
--- a/src/network/access/qnetworkreplyhttpimpl.cpp
+++ b/src/network/access/qnetworkreplyhttpimpl.cpp
@@ -505,7 +505,8 @@ bool QNetworkReplyHttpImplPrivate::loadFromCacheIfAllowed(QHttpNetworkRequest &h
 
     it = cacheHeaders.findRawHeader("content-length");
     if (it != cacheHeaders.rawHeaders.constEnd()) {
-        if (nc->data(httpRequest.url())->size() < it->second.toLongLong())
+        QIODevice *data = nc->data(httpRequest.url());
+        if (!data || data->size() < it->second.toLongLong())
             return false; // The data is smaller than the content-length specified
     }