diff --git a/src/sentry/incidents/endpoints/serializers/workflow_engine_action.py b/src/sentry/incidents/endpoints/serializers/workflow_engine_action.py
index 38a85f3c68b7..1b456e0f90cd 100644
--- a/src/sentry/incidents/endpoints/serializers/workflow_engine_action.py
+++ b/src/sentry/incidents/endpoints/serializers/workflow_engine_action.py
@@ -1,3 +1,4 @@
+import logging
 from collections.abc import Mapping
 from typing import Any, Sequence
 
@@ -18,6 +19,8 @@
 from sentry.users.services.user.model import RpcUser
 from sentry.workflow_engine.models import Action, ActionAlertRuleTriggerAction
 
+logger = logging.getLogger(__name__)
+
 
 class WorkflowEngineActionSerializer(Serializer[dict[str, Any]]):
     def get_attrs(
@@ -61,6 +64,12 @@ def serialize(
         target_identifier: str | None = obj.config.get("target_identifier")
         target_display: str | None = obj.config.get("target_display")
 
+        if target_type is None:
+            logger.warning(
+                "workflow_engine_action.missing_target_type",
+                extra={"action_id": obj.id, "action_type": obj.type},
+            )
+
         sentry_app_id = None
         sentry_app_config = None
         if obj.type == Action.Type.SENTRY_APP.value:
@@ -75,7 +84,9 @@ def serialize(
             ),
             "alertRuleTriggerId": str(alert_rule_trigger_id),
             "type": obj.type,
-            "targetType": ACTION_TARGET_TYPE_TO_STRING[ActionTarget(target_type)],
+            "targetType": ACTION_TARGET_TYPE_TO_STRING[ActionTarget(target_type)]
+            if target_type is not None
+            else None,
             "targetIdentifier": get_identifier_from_action(
                 type_value, str(target_identifier), target_display
             ),