diff --git a/fitnessCog/fitness.py b/fitnessCog/fitness.py
index 542a846..3b0d47a 100644
--- a/fitnessCog/fitness.py
+++ b/fitnessCog/fitness.py
@@ -117,7 +117,7 @@ class FitnessCog(commands.Cog):
                 )
                 return
 
-            unit = parts[2] if len(parts) > 2 else "m"
+            unit = parts[2] if len(parts) > 2 else None
 
             timestamp = int(message.created_at.timestamp())
             username = message.author.name