diff --git a/launcher/net/FileSink.cpp b/launcher/net/FileSink.cpp
index 95c1a8f44..3a58a4667 100644
--- a/launcher/net/FileSink.cpp
+++ b/launcher/net/FileSink.cpp
@@ -54,7 +54,7 @@ Task::State FileSink::init(QNetworkRequest& request)
         return Task::State::Failed;
     }
 
-    wroteAnyData = false;
+    m_wroteAnyData = false;
     m_output_file.reset(new PSaveFile(m_filename));
     if (!m_output_file->open(QIODevice::WriteOnly)) {
         qCCritical(taskNetLogC) << "Could not open " + m_filename + " for writing";
@@ -72,17 +72,19 @@ Task::State FileSink::write(QByteArray& data)
         qCCritical(taskNetLogC) << "Failed writing into " + m_filename;
         m_output_file->cancelWriting();
         m_output_file.reset();
-        wroteAnyData = false;
+        m_wroteAnyData = false;
         return Task::State::Failed;
     }
 
-    wroteAnyData = true;
+    m_wroteAnyData = true;
     return Task::State::Running;
 }
 
 Task::State FileSink::abort()
 {
-    m_output_file->cancelWriting();
+    if (m_output_file) {
+        m_output_file->cancelWriting();
+    }
     failAllValidators();
     return Task::State::Failed;
 }
@@ -100,7 +102,7 @@ Task::State FileSink::finalize(QNetworkReply& reply)
 
     // if we wrote any data to the save file, we try to commit the data to the real file.
     // if it actually got a proper file, we write it even if it was empty
-    if (gotFile || wroteAnyData) {
+    if (gotFile || m_wroteAnyData) {
         // ask validators for data consistency
         // we only do this for actual downloads, not 'your data is still the same' cache hits
         if (!finalizeAllValidators(reply))
diff --git a/launcher/net/FileSink.h b/launcher/net/FileSink.h
index 272f8ddc3..67c25361c 100644
--- a/launcher/net/FileSink.h
+++ b/launcher/net/FileSink.h
@@ -58,7 +58,7 @@ class FileSink : public Sink {
 
    protected:
     QString m_filename;
-    bool wroteAnyData = false;
+    bool m_wroteAnyData = false;
     std::unique_ptr<PSaveFile> m_output_file;
 };
 }  // namespace Net
diff --git a/launcher/net/MetaCacheSink.cpp b/launcher/net/MetaCacheSink.cpp
index 889588a11..432c0c84b 100644
--- a/launcher/net/MetaCacheSink.cpp
+++ b/launcher/net/MetaCacheSink.cpp
@@ -78,7 +78,7 @@ Task::State MetaCacheSink::finalizeCache(QNetworkReply& reply)
 {
     QFileInfo output_file_info(m_filename);
 
-    if (wroteAnyData) {
+    if (m_wroteAnyData) {
         m_entry->setMD5Sum(m_md5Node->hash().toHex().constData());
     }