diff --git a/lib/Hoymiles/src/commands/CommandAbstract.cpp b/lib/Hoymiles/src/commands/CommandAbstract.cpp
index f5bf8e5c..3d41b641 100644
--- a/lib/Hoymiles/src/commands/CommandAbstract.cpp
+++ b/lib/Hoymiles/src/commands/CommandAbstract.cpp
@@ -13,12 +13,6 @@ CommandAbstract::CommandAbstract(uint64_t target_address, uint64_t router_addres
     setTimeout(0);
 }
 
-template <typename T>
-bool CommandAbstract::isA()
-{
-    return dynamic_cast<T*>(this) != NULL;
-}
-
 const uint8_t* CommandAbstract::getDataPayload()
 {
     _payload[_payload_size] = crc8(_payload, _payload_size);
diff --git a/lib/Hoymiles/src/commands/CommandAbstract.h b/lib/Hoymiles/src/commands/CommandAbstract.h
index 2358ddf1..e26f0480 100644
--- a/lib/Hoymiles/src/commands/CommandAbstract.h
+++ b/lib/Hoymiles/src/commands/CommandAbstract.h
@@ -13,9 +13,6 @@ public:
     explicit CommandAbstract(uint64_t target_address = 0, uint64_t router_address = 0);
     virtual ~CommandAbstract() {};
 
-    template <typename T>
-    bool isA();
-
     const uint8_t* getDataPayload();
     void dumpDataPayload(Stream& stream);