diff --git a/dtt/Makefile b/dtt/Makefile
index c6a670a..72e5c88 100644
--- a/dtt/Makefile
+++ b/dtt/Makefile
@@ -30,8 +30,13 @@
 
 LIB	= $(obj)libdtt.a
 
-COBJS	= lm75.o ds1621.o adm1021.o lm81.o ds1775.o
+COBJS-y += lm75.o
+COBJS-y += ds1621.o
+COBJS-y += adm1021.o
+COBJS-y += lm81.o
+COBJS-y += ds1775.o
 
+COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))