diff --git a/static/katex.less b/static/katex.less
index 4d1b9fa..19fb675 100644
--- a/static/katex.less
+++ b/static/katex.less
@@ -179,6 +179,10 @@ big parens
         .baseline-align-hack-outer;
         text-align: left;
 
+        // The rendering of $y'$, for example, looks bad without this.
+        // TODO(alpert): Obviously incorrect. Figure out the proper fix here.
+        margin-left: 0.1em;
+
         .msup,
         .msub {
             .baseline-align-hack-middle;