diff --git a/grbl/config.h b/grbl/config.h
index 30ac9e6..ba3b672 100644
--- a/grbl/config.h
+++ b/grbl/config.h
@@ -40,7 +40,7 @@
 
 // Force other Spindle PWM Pin (default is P2.5)
 //#define SPINDLE_PWM_PIN_1_23
-//#define SPINDLE_PWM_PIN_2_4
+#define SPINDLE_PWM_PIN_2_4
 
 // Define machine type for machine specific defaults
 //#define DEFAULTS_GENERIC