diff --git a/README.md b/README.md
index 96eab2b..563c673 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ postgres_ha_alter_system_settings:
 
 Container share memory can be configured with:
 ```yaml
-postgres_share_memory: '1g'
+postgres_ha_share_memory: '1g'
 ```
 
 Metrics exporter for query performance can be activated with:
diff --git a/defaults/main.yml b/defaults/main.yml
index 901a136..6f3453c 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -15,7 +15,7 @@ postgres_ha_host_uid: '{{ 100000 + postgres_ha_cont_uid | int }}'
 postgres_ha_cont_run_size: '512K'
 postgres_ha_cont_tmp_size: '256K'
 
-#postgres_share_memory: '64m'
+#postgres_ha_share_memory: '64m'
 # Alter System
 postgres_ha_alter_system_settings: {}
 #  max_wal_size: '1GB'
diff --git a/templates/docker-compose.yml.j2 b/templates/docker-compose.yml.j2
index a8edd37..a477b1b 100644
--- a/templates/docker-compose.yml.j2
+++ b/templates/docker-compose.yml.j2
@@ -5,8 +5,8 @@ services:
     container_name: '{{ postgres_ha_cont_name }}'
     image: '{{ postgres_ha_cont_image }}'
     restart: always
-{% if postgres_share_memory is defined %}
-    shm_size: '{{ postgres_share_memory }}'
+{% if postgres_ha_share_memory is defined %}
+    shm_size: '{{ postgres_ha_share_memory }}'
 {% endif %}
     environment:
       POSTGRES_DB:       '{{ postgres_ha_db_name | mandatory }}'