diff --git a/docs/api.md b/docs/api.md
index d62fc512..f5b883a1 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -723,6 +723,7 @@ If `container` a dict, the `Id` key is used.
 **Params**:
 
 * container (str or dict): The container to wait on
+* timeout (int): Request timeout
 
 **Returns** (int): The exit code of the container