diff --git a/src/command.cpp b/src/command.cpp
index 013f93e35..a0e1f7504 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -41,6 +41,7 @@ bool Command::call(const uint8_t device_type, const char * cmd, const char * val
     }
 
 #ifdef EMSESP_DEBUG
+    std::string dname = EMSdevice::device_type_2_device_name(device_type);
     if (value == nullptr) {
         LOG_DEBUG(F("[DEBUG] Calling %s command '%s'"), dname.c_str(), cmd);
     } else if (id == -1) {