diff --git a/ui/temboardui/toolkit/app.py b/ui/temboardui/toolkit/app.py
index 8bbd01147..677430922 100644
--- a/ui/temboardui/toolkit/app.py
+++ b/ui/temboardui/toolkit/app.py
@@ -226,7 +226,7 @@ def read_file(self, parser, filename):
         logger.debug("Reading %s.", filename)
         try:
             with open(filename, "r", "utf-8") as fp:
-                parser.readfp(fp)
+                parser.read_file(fp)
         except OSError as e:
             raise UserError(str(e))