diff --git a/api/sixtyfps-cpp/docs/conf.py b/api/sixtyfps-cpp/docs/conf.py
index b6d767d3f..5bf661c25 100644
--- a/api/sixtyfps-cpp/docs/conf.py
+++ b/api/sixtyfps-cpp/docs/conf.py
@@ -25,6 +25,7 @@ author = 'info@sixtyfps.io'
 # The full version, including alpha/beta/rc tags
 version = '0.1.0'
 
+cpp_index_common_prefix = [ "sixtyfps::", "sixtyfps::interpreter::" ]
 
 # -- General configuration ---------------------------------------------------