diff --git a/IODevice.h b/IODevice.h
index a03a64d..4803f56 100644
--- a/IODevice.h
+++ b/IODevice.h
@@ -380,6 +380,7 @@ private:
   uint8_t *_pinInUse; 
 };
 
+#ifndef IO_NO_HAL
 /////////////////////////////////////////////////////////////////////////////////////////////////////
 /*
  * IODevice subclass for EX-Turntable.
@@ -414,6 +415,7 @@ private:
   uint8_t _stepperStatus;
   uint8_t _previousStatus;
 };
+#endif
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////
 
diff --git a/IO_EXTurntable.cpp b/IO_EXTurntable.cpp
index fc1f9c1..8741c0c 100644
--- a/IO_EXTurntable.cpp
+++ b/IO_EXTurntable.cpp
@@ -28,8 +28,7 @@
 * Refer to the documentation for further information including the valid activities.
 */
 
-#ifndef IO_EXTurntable_h
-#define IO_EXTurntable_h
+#ifndef IO_NO_HAL
 
 #include "IODevice.h"
 #include "I2CManager.h"