diff --git a/configs/xmc4500-relax/src/xmc4_boot.c b/configs/xmc4500-relax/src/xmc4_boot.c
index cc5fec0c19..5dccd23d4c 100644
--- a/configs/xmc4500-relax/src/xmc4_boot.c
+++ b/configs/xmc4500-relax/src/xmc4_boot.c
@@ -65,6 +65,10 @@ void xmc4_board_initialize(void)
 
   board_autoled_initialize();
 #endif
+
+#ifdef CONFIG_XMC4_USCI_SPI
+  xmc4_spidev_initialize();
+#endif
 }
 
 /****************************************************************************