diff --git a/assets/themes/default/_forms.scss b/assets/themes/default/_forms.scss
index 79e2af2e..5c4a03c4 100644
--- a/assets/themes/default/_forms.scss
+++ b/assets/themes/default/_forms.scss
@@ -134,7 +134,7 @@ form.new-post {
 }
 
 .button + .button {
-  margin-left: 1em;
+  margin-inline-start: 1em;
 }
 
 .split {