diff --git a/packages/udi/rtree_udi.c b/packages/udi/rtree_udi.c
index 67b59624c..0f5e8551c 100644
--- a/packages/udi/rtree_udi.c
+++ b/packages/udi/rtree_udi.c
@@ -3,7 +3,7 @@
 #include <string.h>
 #include <assert.h>
 
-#include <Yap/YapInterface.h>
+#include <YapInterface.h>
 
 #include "Yap.h"