1 files changed, 4 insertions, 1 deletions
diff --git a/lang/qt/src/qgpgmedecryptjob.cpp b/lang/qt/src/qgpgmedecryptjob.cpp
index c33a4b5f..37c7ee18 100644
--- a/lang/qt/src/qgpgmedecryptjob.cpp
+++ b/lang/qt/src/qgpgmedecryptjob.cpp
@@ -71,7 +71,10 @@ static QGpgMEDecryptJob::result_type decrypt(Context *ctx, QThread *thread,
     const _detail::ToThreadMover ptMover(plainText,  thread);
 
     QGpgME::QIODeviceDataProvider in(cipherText);
-    const Data indata(&in);
+    Data indata(&in);
+    if (!cipherText->isSequential()) {
+        indata.setSizeHint(cipherText->size());
+    }
 
     if (!plainText) {
         QGpgME::QByteArrayDataProvider out;