diff --git a/src/aap_eda/api/views/decision_environment.py b/src/aap_eda/api/views/decision_environment.py
index 480b37362..cda9cad39 100644
--- a/src/aap_eda/api/views/decision_environment.py
+++ b/src/aap_eda/api/views/decision_environment.py
@@ -113,7 +113,14 @@ def retrieve(self, request, pk):
 
     @extend_schema(
         description="Delete a decision environment by id",
-        responses=status.HTTP_204_NO_CONTENT,
+        responses={
+            status.HTTP_204_NO_CONTENT: OpenApiResponse(
+                None, description="Delete successful."
+            ),
+            status.HTTP_403_FORBIDDEN: OpenApiResponse(
+                None, description="Decision Environment in use by Activations."
+            ),
+        },
         parameters=[
             OpenApiParameter(
                 name="force",