diff --git a/source/scripts.ts b/source/scripts.ts
index 7bd1b7b..a883c2d 100644
--- a/source/scripts.ts
+++ b/source/scripts.ts
@@ -9,7 +9,7 @@ const scripts = {
 	increment: `
       local totalHits = redis.call("INCR", KEYS[1])
       local timeToExpire = redis.call("PTTL", KEYS[1])
-      if timeToExpire <= 0 or ARGV[1] == "1"
+      if timeToExpire < 0 or ARGV[1] == "1"
       then
         redis.call("PEXPIRE", KEYS[1], tonumber(ARGV[2]))
         timeToExpire = tonumber(ARGV[2])