diff --git a/src/hm/hmInverter.h b/src/hm/hmInverter.h
index 54355da5..48b558ba 100644
--- a/src/hm/hmInverter.h
+++ b/src/hm/hmInverter.h
@@ -88,7 +88,7 @@ class CommandAbstract {
         };
         virtual ~CommandAbstract() {};
 
-        const uint8_t getCmd() {
+        uint8_t getCmd() const {
             return _Cmd;
         }