diff --git a/lib/renderer/webview/webview.h b/lib/renderer/webview/webview.h
index e2de89c3..7666dc4f 100644
--- a/lib/renderer/webview/webview.h
+++ b/lib/renderer/webview/webview.h
@@ -1939,6 +1939,7 @@ struct webview_priv
 
     webview_dialog(w, WEBVIEW_DIALOG_TYPE_OPEN, WEBVIEW_DIALOG_FLAG_FILE, "", "",
                    filename, 255);
+    filename[255] = '\0';
     if (strlen(filename) > 0)
     {
       [listener chooseFilename:[NSString stringWithUTF8String:filename]];