diff --git a/docs/src/api.md b/docs/src/api.md
index deb8ec5fc2797b5e47daf90ceeeb8f5b86816c25..3c3fdff8484bfc9aeb487aa17a48ede586610ff4 100644
--- a/docs/src/api.md
+++ b/docs/src/api.md
@@ -95,6 +95,7 @@ calibratetime
 combine
 Orientations
 Compass
+Quaternion
 floordist
 slew
 slerp