diff --git a/include/shuffle.h b/include/shuffle.h
index 0bdd69cd..4e21abb1 100644
--- a/include/shuffle.h
+++ b/include/shuffle.h
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
-
+#define Y Y
 namespace alg {
 	/**
 	 * shuffle the 'list' of length 'len'