diff --git a/Project2.fst b/Project2.fst
index 1535b81..92729bb 100644
--- a/Project2.fst
+++ b/Project2.fst
@@ -138,7 +138,8 @@ let step te cs  =
 	     | (INPUT, stack') -> Next (Exec(((gas-1, pc+1, mem, input::stack'), (actor, input, code), gs) :: ps))
 	     | (GAS, stack') -> Next (Exec(((gas-1, pc+1, mem, gas::stack'), (actor, input, code), gs)::ps))
 	     | (JUMP i, stack') -> Next (Exec((((gas-1, i, mem, stack'), (actor, input, code), gs))::ps))
-	     | (JUMPI i, b::stack') -> magic ()
+	     | (JUMPI i, b::stack') -> let j = (if b = 0 then pc+1 else i) in
+            Next (Exec((((gas-1, j, mem, stack'), (actor, input, code), gs)) :: ps))
 	     | (RETURN, v::stack') -> magic ()
 	     | (STOP, stack') -> Next (Ter (HaltState gs 0 (gas-1)) ps)
 	     | (TIMESTAMP, stack') -> magic ()