1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 669aa17..e241b34 100644
--- a/Makefile
+++ b/Makefile
@@ -91,7 +91,7 @@ simu: $(PROGRAM).lxt2
 	./$< -lxt2
 
 %.vvp: %.v %.tb.v
-	iverilog -o $*.vvp $*.v $*.tb.v
+	iverilog -g2012 -o $*.vvp $*.v $*.tb.v
 
 ## inter-file dependencies
 -include $(DEPS)