diff --git a/common/config.h b/common/config.h
index 4e0de52..6f7798b 100644
--- a/common/config.h
+++ b/common/config.h
@@ -29,6 +29,9 @@
 // no auto repeat stuff
 #define QUICK_TAP_TERM 0
 
+// master has the USB and is the left one
+#define MASTER_LEFT
+
 // tranfer enough info for the stuff we render on the OLEDs
 #define SPLIT_LAYER_STATE_ENABLE
 #define SPLIT_LED_STATE_ENABLE
diff --git a/keyboards/crkbd/keymaps/christoph-cullmann/config.h b/keyboards/crkbd/keymaps/christoph-cullmann/config.h
index d4d52a1..ae8e70b 100644
--- a/keyboards/crkbd/keymaps/christoph-cullmann/config.h
+++ b/keyboards/crkbd/keymaps/christoph-cullmann/config.h
@@ -7,6 +7,3 @@
 
 // our shared config parts
 #include "common/config.h"
-
-// select hand configuration
-#define SPLIT_USB_DETECT