diff --git a/doc/conf.py b/doc/conf.py
index c1b5cc164ca8..d8e554269e62 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -189,7 +189,6 @@ def _check_dependencies():
     'junit': '../test-results/sphinx-gallery/junit.xml' if CIRCLECI else '',
 }
 
-plot_gallery = 'True'
 mathmpl_fontsize = 11.0
 mathmpl_srcset = ['2x']