diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 65eaff36a..83a1041ba 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -799,11 +799,7 @@ BootstrapMageiaCommon() {
 # that function. If Bootstrap is set to a function that doesn't install any
 # packages BOOTSTRAP_VERSION is not set.
 if [ -f /etc/debian_version ]; then
-  Bootstrap() {
-    BootstrapMessage "Debian-based OSes"
-    BootstrapDebCommon
-  }
-  BOOTSTRAP_VERSION="BootstrapDebCommon $BOOTSTRAP_DEB_COMMON_VERSION"
+  DEPRECATED_OS=1
 elif [ -f /etc/mageia-release ]; then
   # Mageia has both /etc/mageia-release and /etc/redhat-release
   DEPRECATED_OS=1
diff --git a/letsencrypt-auto-source/letsencrypt-auto.template b/letsencrypt-auto-source/letsencrypt-auto.template
index cd440fb59..5eb82b705 100755
--- a/letsencrypt-auto-source/letsencrypt-auto.template
+++ b/letsencrypt-auto-source/letsencrypt-auto.template
@@ -321,11 +321,7 @@ DeterminePythonVersion() {
 # that function. If Bootstrap is set to a function that doesn't install any
 # packages BOOTSTRAP_VERSION is not set.
 if [ -f /etc/debian_version ]; then
-  Bootstrap() {
-    BootstrapMessage "Debian-based OSes"
-    BootstrapDebCommon
-  }
-  BOOTSTRAP_VERSION="BootstrapDebCommon $BOOTSTRAP_DEB_COMMON_VERSION"
+  DEPRECATED_OS=1
 elif [ -f /etc/mageia-release ]; then
   # Mageia has both /etc/mageia-release and /etc/redhat-release
   DEPRECATED_OS=1