diff --git a/lib/Hoymiles/src/commands/ChannelChangeCommand.cpp b/lib/Hoymiles/src/commands/ChannelChangeCommand.cpp
index ad89f2d5..227ade1e 100644
--- a/lib/Hoymiles/src/commands/ChannelChangeCommand.cpp
+++ b/lib/Hoymiles/src/commands/ChannelChangeCommand.cpp
@@ -72,7 +72,7 @@ bool ChannelChangeCommand::handleResponse(const fragment_t fragment[], const uin
     return true;
 }
 
-uint8_t ChannelChangeCommand::getMaxResendCount()
+uint8_t ChannelChangeCommand::getMaxResendCount() const
 {
     // This command will never retrieve an answer. Therefor it's not required to repeat it
     return 0;
diff --git a/lib/Hoymiles/src/commands/ChannelChangeCommand.h b/lib/Hoymiles/src/commands/ChannelChangeCommand.h
index 62d0e880..66d4f7c5 100644
--- a/lib/Hoymiles/src/commands/ChannelChangeCommand.h
+++ b/lib/Hoymiles/src/commands/ChannelChangeCommand.h
@@ -17,5 +17,5 @@ public:
 
     virtual bool handleResponse(const fragment_t fragment[], const uint8_t max_fragment_id);
 
-    virtual uint8_t getMaxResendCount();
+    virtual uint8_t getMaxResendCount() const;
 };