diff --git a/projects/mips_sys/ise101/mips_sys/Makefile b/projects/mips_sys/ise101/mips_sys/Makefile
index b48a4b9..15989b8 100644
--- a/projects/mips_sys/ise101/mips_sys/Makefile
+++ b/projects/mips_sys/ise101/mips_sys/Makefile
@@ -14,7 +14,7 @@ par: $(PRJ).ncd
 bit: $(PRJ).bit
 
 # Netlist
-$(PRJ).ngc: $(DIRS) $(PREQ)
+$(PRJ).ngc: $(DIRS) $(PREQ) ./project/$(PRJ).ucf
 	xst -intstyle xflow -ifn ./project/$(PRJ).xst
 
 # Translate
@@ -43,4 +43,4 @@ clean:
 	rm -f xlnx_auto_0.ise
 	rm -f smartpreview.twr
 	rm -f $(PRJ)*.*
-	
\ No newline at end of file
+