diff --git a/defaults/main.yml b/defaults/main.yml
index 46690864..de44dc08 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -263,6 +263,9 @@ glance_pip_packages:
   - uwsgi
   - warlock
 
+# Specific pip packages provided by the user
+glance_user_pip_packages: []
+
 glance_optional_oslomsg_amqp1_pip_packages:
   - oslo.messaging[amqp1]
 
diff --git a/tasks/glance_install_source.yml b/tasks/glance_install_source.yml
index aee6571c..dace7d97 100644
--- a/tasks/glance_install_source.yml
+++ b/tasks/glance_install_source.yml
@@ -42,7 +42,8 @@
     venv_install_destination_path: "{{ glance_bin | dirname }}"
     venv_install_distro_package_list: "{{ glance_distro_packages }}"
     venv_pip_install_args: "{{ glance_pip_install_args }}"
-    venv_pip_packages: "{{ (glance_oslomsg_amqp1_enabled | bool) | ternary(glance_pip_packages + glance_optional_oslomsg_amqp1_pip_packages, glance_pip_packages) }}"
+    venv_pip_packages: "{{ glance_pip_packages | union(glance_user_pip_packages) +
+    (glance_oslomsg_amqp1_enabled | bool) | ternary(glance_optional_oslomsg_amqp1_pip_packages, []) }}"
     venv_facts_when_changed:
       - section: "glance"
         option: "need_service_restart"