diff --git a/plugins/logs/set.go b/plugins/logs/set.go
index 9bd98fba3a0..bb87cf38807 100644
--- a/plugins/logs/set.go
+++ b/plugins/logs/set.go
@@ -33,7 +33,7 @@ func validateMaxSize(appName string, value string) error {
 	}
 
 	if len(value) < 2 {
-		return errors.New("Invalid max-size value, must be a number followed by a unit of measure [k, m, d]")
+		return errors.New("Invalid max-size value, must be a number followed by a unit of measure [k, m, g]")
 	}
 
 	number := value[:len(value)-1]