diff --git a/moderation/importers/moderation.py b/moderation/importers/moderation.py
index d48abea..c5a54fe 100644
--- a/moderation/importers/moderation.py
+++ b/moderation/importers/moderation.py
@@ -69,12 +69,13 @@ class ImportModerationView(ui.View):
             if 'metadata' not in case or not case['metadata']:
                 case['metadata'] = {}
 
-            duration_t = strptime(case['duration'], "%H:%M:%S")
-            duration = timedelta(
-                hours=duration_t.hours,
-                minutes=duration_t.minutes,
-                seconds=duration_t.seconds
-            )
+            if duration != 'NULL':
+                duration_t = strptime(case['duration'], "%H:%M:%S")
+                duration = timedelta(
+                    hours=duration_t.hours,
+                    minutes=duration_t.minutes,
+                    seconds=duration_t.seconds
+                )
 
             await mysql_log(
                 self.ctx.guild.id,