diff --git a/src/libsysprof-gtk/style.css b/src/libsysprof-gtk/style.css
index 947b86c9..db0e31c6 100644
--- a/src/libsysprof-gtk/style.css
+++ b/src/libsysprof-gtk/style.css
@@ -72,6 +72,7 @@ markchart {
 }
 
 timeruler {
+  min-height: 24px;
   font-size: 0.833em;
   color: alpha(currentColor, .8);
 }