diff --git a/user_channel/channel_layer.hpp b/user_channel/channel_layer.hpp
index 3a172bc..5c82fba 100644
--- a/user_channel/channel_layer.hpp
+++ b/user_channel/channel_layer.hpp
@@ -328,6 +328,6 @@
  *
  *  @return the LAN channel name (i.e. eth0)
  */
-std::string getChannelName(const int chNum);
+std::string getChannelName(const uint8_t chNum);
 
 } // namespace ipmi