diff --git a/src/eva/plotting/batch/emcpy/diagnostics/emcpy_horizontal_line.py b/src/eva/plotting/batch/emcpy/diagnostics/emcpy_horizontal_line.py
index 61be4af..fd670d6 100644
--- a/src/eva/plotting/batch/emcpy/diagnostics/emcpy_horizontal_line.py
+++ b/src/eva/plotting/batch/emcpy/diagnostics/emcpy_horizontal_line.py
@@ -43,7 +43,7 @@ def configure_plot(self):
         delvars = ['type', 'schema']
         for d in delvars:
             new_config.pop(d, None)
-        self.plotobj = update_object(self.plotobj, self.config, self.logger)
+        self.plotobj = update_object(self.plotobj, new_config, self.logger)
 
         return self.plotobj