diff --git a/lib/CPUs/MIPS/syn/ise101/Makefile b/lib/CPUs/MIPS/syn/ise101/Makefile
index 58f1f6f..0324ed2 100644
--- a/lib/CPUs/MIPS/syn/ise101/Makefile
+++ b/lib/CPUs/MIPS/syn/ise101/Makefile
@@ -2,6 +2,7 @@ PRJDIR := ./project
 
 PRJ := mips_top
 PREQ := $(PRJDIR)/$(PRJ).prj $(PRJDIR)/$(PRJ).xst $(PRJDIR)/$(PRJ).lso
+DEVICE := "xc4vsx35-ff668-10"
 
 include $(VHDL_HOME)/make/ise.mk