diff --git a/C/exo_udi.c b/C/exo_udi.c
index 128112366..741277e45 100755
--- a/C/exo_udi.c
+++ b/C/exo_udi.c
@@ -32,8 +32,6 @@
 #if HAVE_STRING_H
 #include <string.h>
 #endif
-#define YAP_Term Term
-#define YAP_Atom Atom
 #include <udi.h>