diff --git a/docs/source/conf.py b/docs/source/conf.py
index 46809c5..7f881f5 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -19,6 +19,7 @@
 
 curdir = dirname(__file__)
 sys.path.append(abspath(join(curdir, "..", "..", "mne_pipeline_hd")))
+sys.path.append(abspath(join(curdir, "..", "..", "mne_pipeline_hd", "gui")))
 
 # -- Project information -----------------------------------------------------
 project = "mne-pipeline-hd"