diff --git a/impurity/check_for_impurity.se b/impurity/check_for_impurity.se
index 3de9bf04..2630542f 100644
--- a/impurity/check_for_impurity.se
+++ b/impurity/check_for_impurity.se
@@ -1,8 +1,8 @@
 macro calldatachar($x):
     div(calldataload($x), 2**248)
 
-# sum([2**x for x in [0x31, 0x32, 0x33, 0x3a, 0x3b, 0x3c, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x54, 0x55, 0xf0, 0xff]])
-mask = 57897811465722876096115075801844696845150819816717216876035649536196444422144
+# sum([2**x for x in [0x31, 0x32, 0x33, 0x3a, 0x3b, 0x3c, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x54, 0x55, 0x5a, 0xf0, 0xff]])
+mask = 57897811465722876096115075801844696845150819816718454816074934916471343546368
 
 data approved_addrs[]