diff --git a/deltachat-ffi/deltachat.h b/deltachat-ffi/deltachat.h
index 053f5fc12..fc02f6079 100644
--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -3890,18 +3890,12 @@ int             dc_chat_can_send              (const dc_chat_t* chat);
 
 
 /**
- * Check if a chat is protected.
- *
- * Only verified contacts
- * as determined by dc_contact_is_verified()
- * can be added to protected chats.
- *
- * Protected chats are created using dc_create_group_chat()
- * by setting the 'protect' parameter to 1.
+ * Deprecated, always returns 0.
  *
  * @memberof dc_chat_t
  * @param chat The chat object.
- * @return 1=chat protected, 0=chat is not protected.
+ * @return Always 0.
+ * @deprecated 2025-09-09
  */
 int             dc_chat_is_protected         (const dc_chat_t* chat);
 
diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 96157e4bb..5aadde771 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -3206,13 +3206,8 @@ pub unsafe extern "C" fn dc_chat_can_send(chat: *mut dc_chat_t) -> libc::c_int {
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn dc_chat_is_protected(chat: *mut dc_chat_t) -> libc::c_int {
-    if chat.is_null() {
-        eprintln!("ignoring careless call to dc_chat_is_protected()");
-        return 0;
-    }
-    let ffi_chat = &*chat;
-    ffi_chat.chat.is_protected() as libc::c_int
+pub extern "C" fn dc_chat_is_protected(_chat: *mut dc_chat_t) -> libc::c_int {
+    0
 }
 
 #[no_mangle]