1 files changed, 2 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 12b015b..55be36b 100644
--- a/Makefile
+++ b/Makefile
@@ -24,8 +24,8 @@ clean:
 
 .SECONDEXPANSION:
 pc := %
-%_tb.sim: %_tb.v %.v $$(patsubst $$(pc),$$(pc).v,$$(DEPS-$$*))
-	$(IV) $(IVFLAGS) -o $@ $^
+%_tb.sim: %_tb.v %.v testbench.vh $$(patsubst $$(pc),$$(pc).v,$$(DEPS-$$*))
+	$(IV) $(IVFLAGS) -o $@ $(filter-out %.vh,$^)
 
 .PHONY: all simulate clean
 .SECONDARY: