diff --git a/grbl/config.h b/grbl/config.h
index 354c7b1..30ac9e6 100644
--- a/grbl/config.h
+++ b/grbl/config.h
@@ -223,7 +223,7 @@
 // NOTE: If VARIABLE_SPINDLE is enabled(default), this option has no effect as the PWM output and
 // spindle enable are combined to one pin. If you need both this option and spindle speed PWM,
 // uncomment the config option USE_SPINDLE_DIR_AS_ENABLE_PIN below.
-//#define INVERT_SPINDLE_ENABLE_PIN // Default disabled. Uncomment to enable.
+#define INVERT_SPINDLE_ENABLE_PIN // Default disabled. Uncomment to enable.
 
 // Inverts the selected coolant pin from low-disabled/high-enabled to low-enabled/high-disabled. Useful
 // for some pre-built electronic boards.