diff --git a/gtk2_ardour/ardour2_ui_dark.rc.in b/gtk2_ardour/ardour2_ui_dark.rc.in
index 8896523a68..cfe9ee227d 100644
--- a/gtk2_ardour/ardour2_ui_dark.rc.in
+++ b/gtk2_ardour/ardour2_ui_dark.rc.in
@@ -715,6 +715,7 @@ style "editor_time_ruler" = "small_text"
 {
 	fg[NORMAL] = { 0.80, 0.80, 0.80 }
 	bg[NORMAL] = { 0.09, 0.09, 0.09 }
+        ythickness = 0
 }
 
 style "audio_bus_base"
diff --git a/gtk2_ardour/ardour2_ui_light.rc.in b/gtk2_ardour/ardour2_ui_light.rc.in
index 40d82316af..72bdaf6290 100644
--- a/gtk2_ardour/ardour2_ui_light.rc.in
+++ b/gtk2_ardour/ardour2_ui_light.rc.in
@@ -720,6 +720,7 @@ style "editor_time_ruler" = "small_text"
 {
 	fg[NORMAL] = { 0, 0, 0 }
 	bg[NORMAL] = { 0.74, 0.74, 0.77 }
+        ythickness = 0
 }
 
 style "audio_bus_base"