diff --git a/devtools/client/themes/animationinspector.css b/devtools/client/themes/animationinspector.css
index 4a869d83899..191939f6fbf 100644
--- a/devtools/client/themes/animationinspector.css
+++ b/devtools/client/themes/animationinspector.css
@@ -169,8 +169,19 @@ body {
 #timeline-rate select {
   -moz-appearance: none;
   text-align: center;
-  color: inherit;
   font-family: inherit;
+  color: var(--theme-body-color);
+  font-size: 1em;
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+}
+
+#timeline-rate {
+  position: relative;
+  width: 4em;
 }
 
 /* Animation timeline component */