diff --git a/.dir-locals.el b/.dir-locals.el
index 32c7d66..5f7a7b1 100644
--- a/.dir-locals.el
+++ b/.dir-locals.el
@@ -1,5 +1,5 @@
 ((nil . ((indent-tabs-mode . nil)
-         (fill-column 100)
+         (fill-column . 100)
          (qpdf-cc-style
           .
           ("qpdf"