diff --git a/gtk2_ardour/ardour3_styles.rc.in b/gtk2_ardour/ardour3_styles.rc.in
index d1a4500525..a80cea4b05 100644
--- a/gtk2_ardour/ardour3_styles.rc.in
+++ b/gtk2_ardour/ardour3_styles.rc.in
@@ -642,6 +642,7 @@ style "editor_time_ruler" = "small_text"
 {
 	fg[NORMAL] = @@COLPREFIX@_fg
 	bg[NORMAL] = @@COLPREFIX@_base
+        ythickness = 0
 }
 
 style "audio_bus_base" = "very_small_text"