1 files changed, 3 insertions, 0 deletions
diff --git a/lang/qt/src/qgpgmesignencryptjob.cpp b/lang/qt/src/qgpgmesignencryptjob.cpp
index cc331ed5..e752c0bc 100644
--- a/lang/qt/src/qgpgmesignencryptjob.cpp
+++ b/lang/qt/src/qgpgmesignencryptjob.cpp
@@ -108,6 +108,9 @@ static QGpgMESignEncryptJob::result_type sign_encrypt(Context *ctx, QThread *thr
 
     QGpgME::QIODeviceDataProvider in(plainText);
     Data indata(&in);
+    if (!plainText->isSequential()) {
+        indata.setSizeHint(plainText->size());
+    }
 
     const auto pureFileName = QFileInfo{fileName}.fileName().toStdString();
     if (!pureFileName.empty()) {