diff --git a/dh_haskell_depends b/dh_haskell_depends
index 3ecebec..46b9214 100644
--- a/dh_haskell_depends
+++ b/dh_haskell_depends
@@ -138,7 +138,7 @@ for pkg in `dh_listpackages $args`; do
                 | grep ^/ \
                 | cut -d# -f1 \
                 | sort -u \
-                | xargs dpkg -S \
+                | xargs -r dpkg -S \
                 | cut -d: -f1 \
                 | sort -u \
                 | sed -e :a -e '$!N; s/\n/, /; ta'`