diff --git a/IODevice.h b/IODevice.h
index 38453ce..eda76ab 100644
--- a/IODevice.h
+++ b/IODevice.h
@@ -24,7 +24,7 @@
 //#define DIAG_IO Y
 
 // Define symbol DIAG_LOOPTIMES to enable CS loop execution time to be reported
-#define DIAG_LOOPTIMES
+//#define DIAG_LOOPTIMES
 
 // Define symbol IO_NO_HAL to reduce FLASH footprint when HAL features not required
 // The HAL is disabled by default on Nano and Uno platforms, because of limited flash space.
@@ -348,4 +348,4 @@ private:
 // #include "IO_MCP23017.h"
 // #include "IO_PCF8574.h"
 
-#endif // iodevice_h
\ No newline at end of file
+#endif // iodevice_h