diff --git a/trick_source/codegen/Interface_Code_Gen/makefile b/trick_source/codegen/Interface_Code_Gen/makefile
index ae0a7938..dcaf84ec 100644
--- a/trick_source/codegen/Interface_Code_Gen/makefile
+++ b/trick_source/codegen/Interface_Code_Gen/makefile
@@ -1,4 +1,4 @@
-
+TRICK_HOME := $(abspath $(dir $(lastword $(MAKEFILE_LIST)))../../..)
 # The config_${HOST_TYPE}.mk file provides LLVM_HOME
 include ${TRICK_HOME}/share/trick/makefiles/Makefile.common