diff --git a/Firmware/tmc2130.cpp b/Firmware/tmc2130.cpp
index f9dee3be..15188fc4 100755
--- a/Firmware/tmc2130.cpp
+++ b/Firmware/tmc2130.cpp
@@ -142,8 +142,11 @@ uint16_t __tcoolthrs(uint8_t axis)
 	}
 	return 0;
 }
-
-void tmc2130_init(bool bSupressFlag=false)
+#ifdef PSU_Delta
+void tmc2130_init(bool bSupressFlag)
+#else
+void tmc2130_init()
+#endif
 {
 //	DBG(_n("tmc2130_init(), mode=%S\n"), tmc2130_mode?_n("STEALTH"):_n("NORMAL"));
 	WRITE(X_TMC2130_CS, HIGH);
diff --git a/Firmware/tmc2130.h b/Firmware/tmc2130.h
index a1d160f0..ed4c0d7c 100644
--- a/Firmware/tmc2130.h
+++ b/Firmware/tmc2130.h
@@ -51,7 +51,11 @@ typedef struct
 extern tmc2130_chopper_config_t tmc2130_chopper_config[4];
 
 //initialize tmc2130
+#ifdef PSU_Delta
 extern void tmc2130_init(bool bSupressFlag=false);
+#else
+extern void tmc2130_init();
+#endif
 //check diag pins (called from stepper isr)
 extern void tmc2130_st_isr();
 //update stall guard (called from st_synchronize inside the loop)