diff --git a/debian/patches/avoid-init.pre-update.patch b/debian/patches/avoid-init.pre-update.patch
new file mode 100644
index 0000000..9d66bfe
--- /dev/null
+++ b/debian/patches/avoid-init.pre-update.patch
@@ -0,0 +1,15 @@
+diff --git a/proxmox-spamassassin_3.4.3/rules/init.pre b/proxmox-spamassassin_3.4.3/rules/init.pre
+index f9ee06a..a330bad 100644
+--- a/rules/init.pre
++++ b/rules/init.pre
+@@ -26,6 +26,10 @@
+ #
+ loadplugin Mail::SpamAssassin::Plugin::URIDNSBL
+ 
++# Hashcash - perform hashcash verification.
++#
++loadplugin Mail::SpamAssassin::Plugin::Hashcash
++
+ # SPF - perform SPF verification.
+ #
+ loadplugin Mail::SpamAssassin::Plugin::SPF
diff --git a/debian/patches/series b/debian/patches/series
index 78f208c..8f27ebf 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
 disable-dkim.patch
+avoid-init.pre-update.patch