diff --git a/lib/CPUs/MIPS/ghdl/mips_core.inc b/lib/CPUs/MIPS/ghdl/mips_core.inc
index c496623..70762bb 100644
--- a/lib/CPUs/MIPS/ghdl/mips_core.inc
+++ b/lib/CPUs/MIPS/ghdl/mips_core.inc
@@ -17,7 +17,7 @@ $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_types.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_instr.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_alu.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_bcu.vhd
-$(PKG_NAME)_SRCS += $(MOD_PATH)/mips_biu.vhd
+$(PKG_NAME)_SRCS += $(MOD_PATH)/mips_biu_reg.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_cop.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_dcache.vhd
 $(PKG_NAME)_SRCS += $(MOD_PATH)/mips_icache.vhd
diff --git a/make/ghdl.mk b/make/ghdl.mk
index 863469b..d47e713 100644
--- a/make/ghdl.mk
+++ b/make/ghdl.mk
@@ -63,7 +63,7 @@ all:  analyze
 $(WORK_DIR):
 	mkdir -p $@
 	touch $(TARGET).gtkw
-	cp -u $(TARGET).gtkw $(BUILD_DIR)
+	cp -n $(TARGET).gtkw $(BUILD_DIR)
 
 syntax: 
 	$(GHDL) -s $(GHDL_OPTS) $(SRCS)