diff --git a/goneonize/main.go b/goneonize/main.go
index 0fd08ef7..bffe089e 100644
--- a/goneonize/main.go
+++ b/goneonize/main.go
@@ -1408,6 +1408,22 @@ func SetGroupName(id *C.char, JIDByte *C.uchar, JIDSize C.int, name *C.char) *C.
 	return C.CString("")
 }
 
+//export RejectCall
+func RejectCall(id *C.char, JIDByte *C.uchar, JIDSize C.int, callID *C.char) *C.char {
+	jidbyte := getByteByAddr(JIDByte, JIDSize)
+	var neoJIDProto defproto.JID
+	err := proto.Unmarshal(jidbyte, &neoJIDProto)
+	if err != nil {
+		return C.CString(err.Error())
+	}
+	// callFrom is the caller's JID (the CallOffer creator); whatsmeow addresses the <reject> to it.
+	status_err := clients[C.GoString(id)].RejectCall(context.Background(), utils.DecodeJidProto(&neoJIDProto), C.GoString(callID))
+	if status_err != nil {
+		return C.CString(status_err.Error())
+	}
+	return C.CString("")
+}
+
 //export SetGroupPhoto
 func SetGroupPhoto(id *C.char, JIDByte *C.uchar, JIDSize C.int, Photo *C.uchar, PhotoSize C.int) *C.struct_BytesReturn {
 	var neoJIDProto defproto.JID
diff --git a/neonize/_binder.py b/neonize/_binder.py
index 4a10beda..bea6950a 100644
--- a/neonize/_binder.py
+++ b/neonize/_binder.py
@@ -200,6 +200,13 @@ def _to_c_struct(self) -> "_CProxySettings":
         ctypes.c_char_p,
     ]
     gocode.SetGroupName.restype = ctypes.c_void_p
+    gocode.RejectCall.argtypes = [
+        ctypes.c_char_p,
+        ctypes.c_char_p,
+        ctypes.c_int,
+        ctypes.c_char_p,
+    ]
+    gocode.RejectCall.restype = ctypes.c_void_p
     gocode.GetGroupInviteLink.argtypes = [
         ctypes.c_char_p,
         ctypes.c_char_p,
@@ -612,6 +619,7 @@ def consume_cstring(result, func, arguments):
         "Neonize",
         "LeaveGroup",
         "SetGroupName",
+        "RejectCall",
         "SendChatPresence",
         "GenerateMessageID",
         "FollowNewsletter",
diff --git a/neonize/aioze/client.py b/neonize/aioze/client.py
index a5f7940a..73f680f6 100644
--- a/neonize/aioze/client.py
+++ b/neonize/aioze/client.py
@@ -823,6 +823,30 @@ async def revoke_message(self, chat: JID, sender: JID, message_id: str) -> SendR
         """
         return await self.send_message(chat, await self.build_revoke(chat, sender, message_id))
 
+    async def reject_call(self, call_from: JID, call_id: str) -> str:
+        """Reject (decline) an incoming call.
+
+        Wraps whatsmeow's ``Client.RejectCall``: the call is terminated on the same
+        connection that received the offer. ``call_from`` must be the caller's JID
+        exactly as delivered in the CallOffer (a phone-number or a hosted ``@lid`` JID).
+
+        :param call_from: JID of the caller (the CallOffer creator).
+        :type call_from: JID
+        :param call_id: The call id (CallOffer id).
+        :type call_id: str
+        :return: An empty string on success, otherwise the error text.
+        :rtype: str
+        """
+        jidbuf = call_from.SerializeToString()
+        return (
+            await self.__client.RejectCall(
+                self.uuid,
+                jidbuf,
+                len(jidbuf),
+                ctypes.create_string_buffer(call_id.encode()),
+            )
+        ).decode()
+
     async def build_poll_vote_creation(
         self,
         name: str,
diff --git a/neonize/client.py b/neonize/client.py
index 8dc105b5..411be373 100644
--- a/neonize/client.py
+++ b/neonize/client.py
@@ -764,6 +764,25 @@ def revoke_message(self, chat: JID, sender: JID, message_id: str) -> SendRespons
         """
         return self.send_message(chat, self.build_revoke(chat, sender, message_id))
 
+    def reject_call(self, call_from: JID, call_id: str) -> str:
+        """Reject (decline) an incoming call.
+
+        Wraps whatsmeow's ``Client.RejectCall``: the call is terminated on the same
+        connection that received the offer. ``call_from`` must be the caller's JID
+        exactly as delivered in the CallOffer (a phone-number or a hosted ``@lid`` JID).
+
+        :param call_from: JID of the caller (the CallOffer creator).
+        :type call_from: JID
+        :param call_id: The call id (CallOffer id).
+        :type call_id: str
+        :return: An empty string on success, otherwise the error text.
+        :rtype: str
+        """
+        jidbuf = call_from.SerializeToString()
+        return self.__client.RejectCall(
+            self.uuid, jidbuf, len(jidbuf), ctypes.create_string_buffer(call_id.encode())
+        ).decode()
+
     def build_poll_vote_creation(
         self,
         name: str,