diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp
index 1cb6065a664..9409006abeb 100644
--- a/src/network/access/qnetworkreplyhttpimpl.cpp
+++ b/src/network/access/qnetworkreplyhttpimpl.cpp
@@ -1000,7 +1000,7 @@ void QNetworkReplyHttpImplPrivate::replyDownloadData(QByteArray d)
     QByteDataBuffer pendingDownloadDataCopy = pendingDownloadData;
     pendingDownloadData.clear();
 
-    if (cacheEnabled && !cacheSaveDevice) {
+    if (cacheEnabled && isCachingAllowed() && !cacheSaveDevice) {
         initCacheSaveDevice();
     }
 
@@ -1170,7 +1170,7 @@ void QNetworkReplyHttpImplPrivate::replyDownloadProgressSlot(qint64 bytesReceive
     if (!q->isOpen())
         return;
 
-    if (cacheEnabled && bytesReceived == bytesTotal) {
+    if (cacheEnabled && isCachingAllowed() && bytesReceived == bytesTotal) {
         // Write everything in one go if we use a download buffer. might be more performant.
         initCacheSaveDevice();
         // need to check again if cache enabled and device exists
@@ -2027,6 +2027,11 @@ void QNetworkReplyHttpImplPrivate::setCachingEnabled(bool enable)
     }
 }
 
+bool QNetworkReplyHttpImplPrivate::isCachingAllowed() const
+{
+    return operation == QNetworkAccessManager::GetOperation || operation == QNetworkAccessManager::HeadOperation;
+}
+
 void QNetworkReplyHttpImplPrivate::completeCacheSave()
 {
     if (cacheEnabled && errorCode != QNetworkReplyImpl::NoError) {
diff --git a/src/network/access/qnetworkreplyhttpimpl_p.h b/src/network/access/qnetworkreplyhttpimpl_p.h
index 81393c2af01..956d5c207f6 100644
--- a/src/network/access/qnetworkreplyhttpimpl_p.h
+++ b/src/network/access/qnetworkreplyhttpimpl_p.h
@@ -214,6 +214,7 @@ public:
     void completeCacheSave();
     void setCachingEnabled(bool enable);
     bool isCachingEnabled() const;
+    bool isCachingAllowed() const;
     void initCacheSaveDevice();
     QIODevice *cacheLoadDevice;
     bool loadingFromCache;