diff --git a/check_s3_bucket/__init__.py b/check_s3_bucket/__init__.py
index ed5ee66491604f6b5e9f5a82b78b49372593e4b5..244f2a66d8d9b0b7d66a6d079548994761c72063 100755
--- a/check_s3_bucket/__init__.py
+++ b/check_s3_bucket/__init__.py
@@ -100,7 +100,7 @@ def main():
         exit(2)
 
     # Calculate the age of the latest file and if it's in the thresholds set.
-    if files[0][""] > NOW:
+    if files[0]["HoursSinceLastModified"] > NOW:
         print("Latest file is from the future, something is wrong.")
         exit(3)
     timedelta = files[0]["HoursSinceLastModified"]