diff --git a/compose/config/config_schema_v3.0.json b/compose/config/config_schema_v3.0.json
index 8b8ceac07..1f93347f9 100644
--- a/compose/config/config_schema_v3.0.json
+++ b/compose/config/config_schema_v3.0.json
@@ -167,6 +167,7 @@
         "restart": {"type": "string"},
         "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "shm_size": {"type": ["number", "string"]},
+        "sysctls": {"$ref": "#/definitions/list_or_dict"},
         "stdin_open": {"type": "boolean"},
         "stop_signal": {"type": "string"},
         "stop_grace_period": {"type": "string", "format": "duration"},