diff --git a/Makefile b/Makefile
index 0e61a3a8..c1631dc3 100644
--- a/Makefile
+++ b/Makefile
@@ -73,8 +73,8 @@ STP := stp/columns.lisp stp/constraints.lisp \
 
 TABLES := $(wildcard lookup_tables/tables/*lisp)
 
-EUC := euc/columns.lisp euc/constraints.lisp \
-	euc/euc_into_wcp.lisp
+EUC := euc \
+	euc/lookup/euc_into_wcp.lisp
 
 TRM := trm/columns.lisp trm/constraints.lisp
 
diff --git a/euc/euc_into_wcp.lisp b/euc/lookup/euc_into_wcp.lisp
similarity index 100%
rename from euc/euc_into_wcp.lisp
rename to euc/lookup/euc_into_wcp.lisp