diff --git a/syncplay/players/mpc.py b/syncplay/players/mpc.py
index 68f7e9b..d53645a 100755
--- a/syncplay/players/mpc.py
+++ b/syncplay/players/mpc.py
@@ -86,7 +86,7 @@ class MpcHcApi:
             _fields_ = [
                 ('nMsgPos', ctypes.c_int32),
                 ('nDurationMS', ctypes.c_int32),
-                ('strMsg', ctypes.c_wchar * (len(message) + 1))
+                ('strMsg', ctypes.c_wchar * (len(message.encode('utf-8')) + 1))
             ]
         cmessage = __OSDDATASTRUCT()
         cmessage.nMsgPos = MsgPos