diff --git a/command/channel_auth.hpp b/command/channel_auth.hpp
index 1d1d5c4..7b922c2 100644
--- a/command/channel_auth.hpp
+++ b/command/channel_auth.hpp
@@ -118,7 +118,7 @@
  *
  * @return Response data for the command
  */
-std::vector<uint8_t> GetChannelCapabilities(std::vector<uint8_t>& inPayload,
-                                            const message::Handler& handler);
+std::vector<uint8_t> GetChannelCapabilities(
+        const std::vector<uint8_t>& inPayload, const message::Handler& handler);
 
 } // namespace command