diff --git a/gtk2_ardour/ardour3_ui_default.conf b/gtk2_ardour/ardour3_ui_default.conf
index 42bc01c786..0b01ab0c72 100644
--- a/gtk2_ardour/ardour3_ui_default.conf
+++ b/gtk2_ardour/ardour3_ui_default.conf
@@ -171,7 +171,7 @@
     <Option name="video timeline bar" value="303030ff"/>
     <Option name="region base" value="99a7b5a0"/>
     <Option name="region area covered by another region" value="505050b0"/>
-    <Option name="waveform outline" value="00000000"/>
+    <Option name="waveform outline" value="000000ff"/>
     <Option name="clipped waveform" value="ff0000e5"/>
     <Option name="waveform fill" value="ffffffff"/>
     <Option name="zero line" value="7f7f7f58"/>