diff --git a/hw/bsp/xmc4000/boards/xmc4500_relax/board.mk b/hw/bsp/xmc4000/boards/xmc4500_relax/board.mk
index 371adff91..2b8f7bc57 100644
--- a/hw/bsp/xmc4000/boards/xmc4500_relax/board.mk
+++ b/hw/bsp/xmc4000/boards/xmc4500_relax/board.mk
@@ -3,7 +3,7 @@ CFLAGS += \
   -DXMC4500_F100x1024 \
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=stringop-overread
+CFLAGS += -Wno-stringop-overread
 
 LD_FILE = $(MCU_DIR)/CMSIS/Infineon/COMPONENT_$(MCU_VARIANT)/Source/TOOLCHAIN_GCC_ARM/XMC4500x1024.ld
 
diff --git a/hw/bsp/xmc4000/family.c b/hw/bsp/xmc4000/family.c
index 35bed0ba4..78c968468 100644
--- a/hw/bsp/xmc4000/family.c
+++ b/hw/bsp/xmc4000/family.c
@@ -84,7 +84,9 @@ void board_init(void)
 #endif
 
   // USB Power Enable
+#if(UC_SERIES != XMC45)
   XMC_SCU_CLOCK_UngatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_USB0);
+#endif  
   XMC_SCU_RESET_DeassertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_USB0);
   XMC_SCU_POWER_EnableUsb();
 }