diff --git a/projects/mips_sys/ise101/mips_sys/Makefile b/projects/mips_sys/ise101/mips_sys/Makefile
index 6500215..bae0e34 100644
--- a/projects/mips_sys/ise101/mips_sys/Makefile
+++ b/projects/mips_sys/ise101/mips_sys/Makefile
@@ -11,7 +11,7 @@ netlist: $(PRJ).ngc
 translate: $(PRJ).ngd
 map: $(PRJ)_map.ncd
 par: $(PRJ).ncd
-bitfile: $(PRJ).bit
+bit: $(PRJ).bit
 
 # Netlist
 $(PRJ).ngc: $(DIRS) $(PREQ)
@@ -37,9 +37,11 @@ $(DIRS):
 	mkdir -p $(DIRS)
 
 clean:
+	rm -rf ./_ngo
 	rm -rf ./xst
 	rm -rf ./xlnx_auto_0_xdb
 	rm -f xlnx_auto_0.ise
+	rm -f smartpreview.twr
 	rm -f $(PRJ)*.*