diff --git a/Ubiquitous/XiUOS/arch/arm/Makefile b/Ubiquitous/XiUOS/arch/arm/Makefile
index 5000fdbfb..a34ffee8e 100644
--- a/Ubiquitous/XiUOS/arch/arm/Makefile
+++ b/Ubiquitous/XiUOS/arch/arm/Makefile
@@ -6,6 +6,7 @@ SRC_DIR += cortex-m3
 endif
 
 ifeq ($(CONFIG_BOARD_STM32F103_NANO),y)
+SRC_DIR := shared
 SRC_DIR +=cortex-m3
 endif