diff --git a/IODevice.h b/IODevice.h
index ca16285..6717c8b 100644
--- a/IODevice.h
+++ b/IODevice.h
@@ -344,8 +344,8 @@ private:
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////
 
-// #include "IO_MCP23008.h"
-// #include "IO_MCP23017.h"
-// #include "IO_PCF8574.h"
+#include "IO_MCP23008.h"
+#include "IO_MCP23017.h"
+#include "IO_PCF8574.h"
 
 #endif // iodevice_h
\ No newline at end of file