diff --git a/xxxApp/src/Makefile b/xxxApp/src/Makefile
index dec45e3abc550e99eabcb91891c4d0546fa9e63b..0b0faec6f6f6174cc10d4f0e567f1e5b00eeb956 100644
--- a/xxxApp/src/Makefile
+++ b/xxxApp/src/Makefile
@@ -120,8 +120,8 @@ ifdef QUADEM
 endif
 
 ifdef MODBUS
-        xxx_Common_DBD += modbus.dbd modbusSupport.dbd
-        xxx_Common_LIBS += modbus
+	xxx_Common_DBD += modbus.dbd modbusSupport.dbd
+	xxx_Common_LIBS := modbus
 endif
 
 ifdef MOTOR