diff --git a/progress.go b/progress.go
index 3d144da..9bb557e 100644
--- a/progress.go
+++ b/progress.go
@@ -146,7 +146,7 @@
 // Add creates a bar which renders itself by provided BarFiller.
 // If `total <= 0` triggering complete event by increment methods
 // is disabled. If *Progress instance is done, i.e. called after
-// (*Progress).Wait(), return err == DoneError.
+// (*Progress).Wait(), return error == DoneError.
 func (p *Progress) Add(total int64, filler BarFiller, options ...BarOption) (*Bar, error) {
 	if filler == nil {
 		filler = NopStyle().Build()