diff --git a/common/lib/capa/capa/templates/codeinput.html b/common/lib/capa/capa/templates/codeinput.html
index 5c2ff2aca5..eb8cad0d70 100644
--- a/common/lib/capa/capa/templates/codeinput.html
+++ b/common/lib/capa/capa/templates/codeinput.html
@@ -50,6 +50,7 @@
         },
         smartIndent: false
       });
+      $("#textbox_${id}").find('.CodeMirror-scroll').height(${int(13.5*eval(rows))});
     });
   </script>
 </section>