1 files changed, 5 insertions, 3 deletions
diff --git a/src/core/web_contents_adapter.cpp b/src/core/web_contents_adapter.cpp
index e2aedc9bb..0592e36fb 100644
--- a/src/core/web_contents_adapter.cpp
+++ b/src/core/web_contents_adapter.cpp
@@ -624,9 +624,11 @@ void WebContentsAdapter::setContent(const QByteArray &data, const QString &mimeT
     CHECK_VALID_RENDER_WIDGET_HOST_VIEW(d->webContents->GetRenderViewHost());
 
     QByteArray encodedData = data.toPercentEncoding();
-    std::string urlString("data:");
-    urlString.append(mimeType.toStdString());
-    urlString.append(",");
+    std::string urlString;
+    if (!mimeType.isEmpty())
+        urlString = std::string("data:") + mimeType.toStdString() + std::string(",");
+    else
+        urlString = std::string("data:text/plain;charset=US-ASCII,");
     urlString.append(encodedData.constData(), encodedData.length());
 
     GURL dataUrlToLoad(urlString);