diff --git a/Firmware/tmc2130.h b/Firmware/tmc2130.h
index e09e027c3..7ebc875e6 100644
--- a/Firmware/tmc2130.h
+++ b/Firmware/tmc2130.h
@@ -137,7 +137,7 @@ struct TMCInitParams {
     inline explicit TMCInitParams(bool bSuppressFlag, bool enableECool):bSuppressFlag(bSuppressFlag), enableECool(enableECool) { }
     inline explicit TMCInitParams(bool enableECool)
         : bSuppressFlag(
-#ifdef PSU_delta
+#ifdef PSU_Delta
         1
 #else
         0