diff --git a/octoprint/util/__init__.py b/octoprint/util/__init__.py
index ff6e592..8ffd953 100644
--- a/octoprint/util/__init__.py
+++ b/octoprint/util/__init__.py
@@ -28,7 +28,7 @@ def isAllowedFile(filename, extensions):
 def getFormattedTimeDelta(d):
 	if d is None:
 		return None
-	hours = d.seconds // 3600
+	hours = d.days * 24 + d.seconds // 3600
 	minutes = (d.seconds % 3600) // 60
 	seconds = d.seconds % 60
 	return "%02d:%02d:%02d" % (hours, minutes, seconds)