diff --git a/config.sanguinololu-v1.2.h b/config.sanguinololu-v1.2.h
index cfda0c2..5532a60 100644
--- a/config.sanguinololu-v1.2.h
+++ b/config.sanguinololu-v1.2.h
@@ -222,7 +222,7 @@
 //#define	Z_INVERT_DIR
 //#define	Z_INVERT_MIN
 //#define	Z_INVERT_MAX
-//#define	Z_INVERT_ENABLE
+#define	Z_INVERT_ENABLE
 
 #define	E_STEP_PIN						DIO1
 #define	E_DIR_PIN							DIO0
@@ -232,7 +232,7 @@
 
 #define	PS_ON_PIN							DIO9
 #define	STEPPER_ENABLE_PIN		DIO14
-//#define	STEPPER_INVERT_ENABLE
+#define	STEPPER_INVERT_ENABLE
 
 //#define	SD_CARD_DETECT		 		DIO2
 //#define	SD_WRITE_PROTECT			DIO3