diff --git a/projects/mips_sys/ise101/mips_sys/Makefile b/projects/mips_sys/ise101/mips_sys/Makefile
index 48fb051..b48a4b9 100644
--- a/projects/mips_sys/ise101/mips_sys/Makefile
+++ b/projects/mips_sys/ise101/mips_sys/Makefile
@@ -23,11 +23,11 @@ $(PRJ).ngd: $(PRJ).ngc ./project/$(PRJ).ucf
 
 # Map
 $(PRJ)_map.ncd: $(PRJ).ngd
-	map -intstyle xflow -p $(DEVICE) -timing -logic_opt on -ol high -xe n -t 1 -register_duplication -cm area -ignore_keep_hierarchy -pr off -k 4 -power off -o $(PRJ)_map.ncd $(PRJ).ngd $(PRJ).pcf
+	map -intstyle xflow -p $(DEVICE) -timing -logic_opt on -ol high -t 1 -register_duplication -cm area -ignore_keep_hierarchy -pr off -k 4 -power off -o $(PRJ)_map.ncd $(PRJ).ngd $(PRJ).pcf
 
 # PAR
 $(PRJ).ncd: $(PRJ)_map.ncd
-	par -w -intstyle xflow -ol high -xe n -t 1 $(PRJ)_map.ncd $(PRJ).ncd $(PRJ).pcf
+	par -w -intstyle xflow -ol high -t 1 $(PRJ)_map.ncd $(PRJ).ncd $(PRJ).pcf
 
 # Bitgen
 $(PRJ).bit: $(PRJ).ncd ./project/$(PRJ).ut