diff --git a/cpustat/Makefile b/cpustat/Makefile
index a4d159e..30dfeb8 100644
--- a/cpustat/Makefile
+++ b/cpustat/Makefile
@@ -13,12 +13,12 @@ OBJ = cpustat.o
 all: $(CPUSTAT)
 
 $(CPUSTAT): $(OBJ)
-	$(CC) $(LDFLAGS) $(OBJ) $(LDLIBS) -o $?
+	$(CC) $(LDFLAGS) $(OBJ) $(LDLIBS) -o $(CPUSTAT)
 
 install: all
 	install -s -C $(CPUSTAT) $(PREFIX)/bin
 
 clean:
-	$(RM) *.o *.a a.out core temp.* $(PROGS)
+	$(RM) *.o *.a a.out core temp.* $(CPUSTAT)
 	$(RM) -r *.dSYM