diff --git a/folium/plugins/realtime.py b/folium/plugins/realtime.py
index 515b70194..7944e3fe1 100644
--- a/folium/plugins/realtime.py
+++ b/folium/plugins/realtime.py
@@ -42,7 +42,7 @@ class Realtime(JSCSSMixin, FeatureGroup):
     remove_missing: bool, default False
         Should missing features between updates been automatically
         removed from the layer
-    container: Layer, default GeoJson
+    container: FeatureGroup or GeoJson, default GeoJson
         The container will typically be a `FeatureGroup`, `MarkerCluster` or
         `GeoJson`, but it can be anything that generates a javascript
         L.LayerGroup object, i.e. something that has the methods