diff --git a/src/style/components/ephemeral-timer.less b/src/style/components/ephemeral-timer.less
index 9275c0b56eb..9847f723e81 100644
--- a/src/style/components/ephemeral-timer.less
+++ b/src/style/components/ephemeral-timer.less
@@ -17,7 +17,7 @@
  *
  */
 
-@strokewidth: 4;
+@strokewidth: 4px;
 @strokelength: @strokewidth * pi();
 
 .ephemeral-timer {