diff --git a/pygeoapi/openapi.py b/pygeoapi/openapi.py
index 8f849ea..89f26b1 100644
--- a/pygeoapi/openapi.py
+++ b/pygeoapi/openapi.py
@@ -977,6 +977,7 @@ def get_oas_30(cfg):
                     'operationId': 'getMap',
                     'parameters': [
                         {'$ref': f"{OPENAPI_YAML['oapif']}#/components/parameters/bbox"},  # noqa
+                        {'$ref': f"{OPENAPI_YAML['oapif']}#/components/parameters/datetime"},  # noqa
                         {
                             'name': 'width',
                             'in': 'query',