diff --git a/lib/script/interpreter.js b/lib/script/interpreter.js
index 3041c6d..84c039f 100644
--- a/lib/script/interpreter.js
+++ b/lib/script/interpreter.js
@@ -185,7 +185,7 @@ Interpreter.false = new Buffer([]);
 Interpreter.MAX_SCRIPT_ELEMENT_SIZE = 520;
 
 Interpreter.LOCKTIME_THRESHOLD = 500000000;
-Interpreter.LOCKTIME_THRESHOLD_BN = new BN(500000000);
+Interpreter.LOCKTIME_THRESHOLD_BN = new BN(Interpreter.LOCKTIME_THRESHOLD);
 
 // flags taken from bitcoind
 // bitcoind commit: b5d1b1092998bc95313856d535c632ea5a8f9104