diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index c8228b36f..1e3118848 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -527,6 +527,7 @@ Bootstrap() {
     echo "You will need to bootstrap, configure virtualenv, and run pip install manually."
     echo "Please see https://letsencrypt.readthedocs.org/en/latest/contributing.html#prerequisites"
     echo "for more info."
+    exit 1
   fi
 }
 
diff --git a/letsencrypt-auto-source/letsencrypt-auto.template b/letsencrypt-auto-source/letsencrypt-auto.template
index e8f313208..ecc9a042a 100755
--- a/letsencrypt-auto-source/letsencrypt-auto.template
+++ b/letsencrypt-auto-source/letsencrypt-auto.template
@@ -201,6 +201,7 @@ Bootstrap() {
     echo "You will need to bootstrap, configure virtualenv, and run pip install manually."
     echo "Please see https://letsencrypt.readthedocs.org/en/latest/contributing.html#prerequisites"
     echo "for more info."
+    exit 1
   fi
 }