diff --git a/ideas/index.rst b/ideas/index.rst
index 4564043a46a7afdf650ca9c4d634c061fef15de0..8bf329e237ea8a3dba8f718c55e347e48d2626a3 100644
--- a/ideas/index.rst
+++ b/ideas/index.rst
@@ -1,4 +1,4 @@
-   :html_theme.sidebar_primary.remove: true
+:html_theme.sidebar_primary.remove: true
 :sd_hide_title: true
 
 .. _gsoc-project-ideas: