diff --git a/lecture.cls b/lecture.cls
index caff339..cf7c3de 100644
--- a/lecture.cls
+++ b/lecture.cls
@@ -105,3 +105,9 @@
 
 % activate my colour style
 \lstset{style=mystyle}
+
+% better stackrel
+\let\oldstackrel\stackrel
+\renewcommand{\stackrel}[2]{%
+    \oldstackrel{\mathclap{#1}}{#2}
+}%