diff --git a/src/moulti/protocol.py b/src/moulti/protocol.py
index bb3bea0..bedd0cd 100644
--- a/src/moulti/protocol.py
+++ b/src/moulti/protocol.py
@@ -119,12 +119,14 @@ def clean_socket(socket_path: str = PRINTABLE_MOULTI_SOCKET) -> None:
 			pass
 
 def get_unix_credentials(socket: Socket) -> tuple[int, int, int]:
-	# struct ucred is { pid_t, uid_t, gid_t }
-	struct_ucred = '3i'
-	from socket import SO_PEERCRED # pylint: disable=import-outside-toplevel
-	unix_credentials = socket.getsockopt(SOL_SOCKET, SO_PEERCRED, calcsize(struct_ucred))
-	pid, uid, gid = unpack(struct_ucred, unix_credentials)
-	return pid, uid, gid
+	if sys.platform == 'linux':
+		# struct ucred is { pid_t, uid_t, gid_t }
+		struct_ucred = '3i'
+		from socket import SO_PEERCRED # pylint: disable=import-outside-toplevel,no-name-in-module
+		unix_credentials = socket.getsockopt(SOL_SOCKET, SO_PEERCRED, calcsize(struct_ucred))
+		pid, uid, gid = unpack(struct_ucred, unix_credentials)
+		return pid, uid, gid
+	return -1, -1, -1
 
 def moulti_connect(address: str = MOULTI_SOCKET, bind: str | None = None) -> Socket:
 	client_socket = moulti_unix_socket()