diff --git a/roles/postgres/defaults/main.yml b/roles/postgres/defaults/main.yml
index 06e06fc..2268619 100644
--- a/roles/postgres/defaults/main.yml
+++ b/roles/postgres/defaults/main.yml
@@ -51,7 +51,7 @@ postgres_base_config:
     line: "unix_socket_directories = '/var/run/postgresql'"
   -
     regex: "^dynamic_shared_memory_type"
-    line: "dynamic_shared_memory_type = posix"
+    line: "dynamic_shared_memory_type = mmap"
   -
     regex: "^max_wal_size"
     line: "max_wal_size = 1GB"