diff --git a/lib/CPUs/MIPS/syn/ise101/Makefile b/lib/CPUs/MIPS/syn/ise101/Makefile
index b569f07..5285554 100644
--- a/lib/CPUs/MIPS/syn/ise101/Makefile
+++ b/lib/CPUs/MIPS/syn/ise101/Makefile
@@ -1,3 +1,4 @@
+include $(VHDL_HOME)/defs.mk
 PRJDIR := ./project
 
 PRJ := mips_top