diff --git a/api/swagger.yaml b/api/swagger.yaml
index 8ff7415d62..6fabc89a07 100644
--- a/api/swagger.yaml
+++ b/api/swagger.yaml
@@ -443,6 +443,10 @@ definitions:
       OomKillDisable:
         description: "Disable OOM Killer for the container."
         type: "boolean"
+      Init:
+        description: "Run an init inside the container that forwards signals and reaps processes. This field is omitted if empty, and the default (as configured on the daemon) is used."
+        type: "boolean"
+        x-nullable: true
       PidsLimit:
         description: "Tune a container's pids limit. Set -1 for unlimited."
         type: "integer"