diff --git a/zerver/openapi/zulip.yaml b/zerver/openapi/zulip.yaml
index e7151be305..4bc301481f 100644
--- a/zerver/openapi/zulip.yaml
+++ b/zerver/openapi/zulip.yaml
@@ -5015,8 +5015,8 @@ paths:
           description: |
             The ID of the attachment to be deleted.
           schema:
-            type: string
-          example: "1"
+            type: integer
+          example: 1
           required: true
       responses:
         "200":
diff --git a/zerver/views/attachments.py b/zerver/views/attachments.py
index e23bacd5c8..7fb88a9074 100644
--- a/zerver/views/attachments.py
+++ b/zerver/views/attachments.py
@@ -16,8 +16,8 @@ def list_by_user(request: HttpRequest, user_profile: UserProfile) -> HttpRespons
     )
 
 
-def remove(request: HttpRequest, user_profile: UserProfile, attachment_id: str) -> HttpResponse:
-    attachment = access_attachment_by_id(user_profile, int(attachment_id), needs_owner=True)
+def remove(request: HttpRequest, user_profile: UserProfile, attachment_id: int) -> HttpResponse:
+    attachment = access_attachment_by_id(user_profile, attachment_id, needs_owner=True)
     remove_attachment(user_profile, attachment)
-    notify_attachment_update(user_profile, "remove", {"id": int(attachment_id)})
+    notify_attachment_update(user_profile, "remove", {"id": attachment_id})
     return json_success(request)