diff --git a/completions/dpkg b/completions/dpkg
index 5794c2e1..1d1ea825 100644
--- a/completions/dpkg
+++ b/completions/dpkg
@@ -19,7 +19,7 @@ _comp_dpkg_installed_packages()
 _have grep-status && {
 _comp_dpkg_purgeable_packages()
 {
-    grep-status -P -e '^ruby' -a -FStatus 'install ok installed' -o -FStatus 'deinstall ok config-files' -n -s Package
+    grep-status -P -e '^$1' -a -FStatus 'install ok installed' -o -FStatus 'deinstall ok config-files' -n -s Package
 }
 } || {
 _comp_dpkg_purgeable_packages()