diff --git a/job.go b/job.go
index e19af47..c2a7a60 100644
--- a/job.go
+++ b/job.go
@@ -2252,8 +2252,7 @@ func jobShops(j Job) {
 			out = fmt.Sprintf("%s [%d : %d]", out, cwm.Mana, cwm.ManaTotal)
 
 			if cwm.Mana < cwm.ManaTotal {
-				s := (((cwm.ManaTotal - cwm.Mana) * 60) / ((cwm.ManaTotal / 250) + 1))
-				d := s * time.Second
+				d := time.Duration(((cwm.ManaTotal-cwm.Mana)*60)/((cwm.ManaTotal/250)+1)) * time.Second
 				out = fmt.Sprintf("%s %s\n", out, d.String())
 			} else {
 				out = fmt.Sprintf("%s\n", out)