diff --git a/alliance/share/tutorials/vasy/hadamard_2.pat b/alliance/share/tutorials/vasy/hadamard_2.pat
index aa8351fc..1559b971 100644
--- a/alliance/share/tutorials/vasy/hadamard_2.pat
+++ b/alliance/share/tutorials/vasy/hadamard_2.pat
@@ -1,4 +1,5 @@
 
+in       ck B;
 in       data (7 downto 0) B;
 in       empty B;
 in       full B;