diff --git a/tasks/docker-compose.yml b/tasks/docker-compose.yml
index 99b747e..d687a59 100644
--- a/tasks/docker-compose.yml
+++ b/tasks/docker-compose.yml
@@ -19,4 +19,4 @@
     dest: "{{ docker_compose_path }}"
     mode: 0755
   become: true
-  environment: "{{ proxy_env }}"
+  environment: "{{ proxy_env|default('') }}"
diff --git a/tasks/main.yml b/tasks/main.yml
index cccc8d6..26a9614 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -11,7 +11,7 @@
     state: "{{ docker_package_state }}"
   notify: restart docker
   become: true
-  environment: "{{ proxy_env }}"
+  environment: "{{ proxy_env|default('') }}"
 
 # TODO: Remove this shim once 18.09.1 or later is released.
 - import_tasks: docker-1809-shim.yml
diff --git a/tasks/setup-RedHat.yml b/tasks/setup-RedHat.yml
index 93009ff..b0fd2ca 100644
--- a/tasks/setup-RedHat.yml
+++ b/tasks/setup-RedHat.yml
@@ -12,7 +12,7 @@
     key: https://download.docker.com/linux/centos/gpg
     state: present
   become: true
-  environment: "{{ proxy_env }}"
+  environment: "{{ proxy_env|default('') }}"
 
 - name: Add Docker repository.
   get_url:
@@ -22,7 +22,7 @@
     group: root
     mode: 0644
   become: true
-  environment: "{{ proxy_env }}"
+  environment: "{{ proxy_env|default('') }}"
 
 - name: Configure Docker Edge repo.
   ini_file: