diff --git a/chrome/less_static_throbber.css b/chrome/less_static_throbber.css
index 69144ab..413ea1e 100644
--- a/chrome/less_static_throbber.css
+++ b/chrome/less_static_throbber.css
@@ -6,7 +6,7 @@ See the above repository for updates as well as full license text. */
 /* svg.context-properties.content.enabled must be "true" otherwise the icon will be black */
 
 @media (prefers-reduced-motion:reduce){
-  @keyframes rotate-throbber{from{transform: rotateZ(0deg)}to{rotateZ(360deg)}}
+  @keyframes rotate-throbber{from{transform:rotateZ(0deg)}to{transform:rotateZ(360deg)}}
   .tab-throbber{
     background-image: url("data:image/svg+xml;base64,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") !important;
     -moz-context-properties: fill,fill-opacity !important;