diff --git a/commonincludes.def b/commonincludes.def
index 2d8877d..6daedae 100644
--- a/commonincludes.def
+++ b/commonincludes.def
@@ -46,6 +46,8 @@
 
 \RequirePackage{microtype}
 
+\RequirePackage{multicol}
+
 % Allow hyphenation in narrow margin paragraphs.
 \RequirePackage{ragged2e}