diff --git a/make_cuts.imba b/make_cuts.imba
index b21aefa..421a720 100644
--- a/make_cuts.imba
+++ b/make_cuts.imba
@@ -46,7 +46,7 @@ def to_hms secs
 		Math.floor secs / 3600
 		Math.floor (secs % 3600) / 60
 		Math.round((secs % 3600 % 60) * 1000) / 1000
-	].filter(Boolean).join("-")
+	].map(do String($1).padStart(2,0)).join("-")
 
 def main