diff --git a/bar_option.go b/bar_option.go
index 31b7939..e7d2e41 100644
--- a/bar_option.go
+++ b/bar_option.go
@@ -123,11 +123,18 @@
 	}
 }
 
-// TrimSpace trims bar's edge spaces.
+// BarFillerTrim bar filler is rendered with leading and trailing space
+// like ' [===] ' by default. With this option leading and trailing
+// space will be removed.
+func BarFillerTrim() BarOption {
+	return func(s *bState) {
+		s.trimSpace = true
+	}
+}
+
+// TrimSpace is an alias to BarFillerTrim.
 func TrimSpace() BarOption {
-	return func(s *bState) {
-		s.trimSpace = true
-	}
+	return BarFillerTrim()
 }
 
 // BarStyle overrides mpb.DefaultBarStyle which is "[=>-]<+".