diff --git a/Common/sim/ieee_proposed.make b/Common/sim/ieee_proposed.make
index 78f901c..f12defa 100644
--- a/Common/sim/ieee_proposed.make
+++ b/Common/sim/ieee_proposed.make
@@ -1,7 +1,7 @@
 # -------------------------------------------------
 # Compile script for GHDL
 # -------------------------------------------------
-include ../make/defs.mk
+include $(VHDL_HOME)/make/defs.mk
 
 # -------------------------------------------------
 # Global options
@@ -24,5 +24,5 @@ SRCS += $(LIB_PATH)/fixed_float_types_c.vhdl
 SRCS += $(LIB_PATH)/fixed_pkg_c.vhdl
 SRCS += $(LIB_PATH)/float_pkg_c.vhdl
 
-include ../make/ghdl.mk
+include $(VHDL_HOME)/make/ghdl.mk