diff --git a/lib/facter/postgres_default_version.rb b/lib/facter/postgres_default_version.rb
index 76ee66c..12c93b7 100644
--- a/lib/facter/postgres_default_version.rb
+++ b/lib/facter/postgres_default_version.rb
@@ -48,18 +48,15 @@ end
 
 Facter.add("postgres_default_version") do
   setcode do
-    result =
-      case Facter.value('osfamily')
-        when 'RedHat'
-          get_redhatfamily_postgres_version()
-        when 'Debian'
-          get_debianfamily_postgres_version()
-        else
-          nil
-      end
-    if result == nil
-      result = "Unsupported OS!  Please check `postgres_default_version` fact."
+    case Facter.value('osfamily')
+      when 'RedHat'
+        get_redhatfamily_postgres_version()
+      when 'Linux'
+        get_redhatfamily_postgres_version()
+      when 'Debian'
+        get_debianfamily_postgres_version()
+      else
+        "Unsupported OS!  Please check `postgres_default_version` fact."
     end
-    result
   end
-end
+end
\ No newline at end of file
diff --git a/manifests/params.pp b/manifests/params.pp
index 0328e96..126be21 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -84,9 +84,16 @@ class postgresql::params(
     }
   }
 
+  # Amazon Linux's OS Family is 'Linux', operating system 'Amazon'.
   case $::osfamily {
-    'RedHat': {
+    'RedHat', 'Linux': {
       $needs_initdb             = true
+      $initdb_path              = '/usr/bin/initdb'
+      $createdb_path            = '/usr/bin/createdb'
+      $psql_path                = '/usr/bin/psql'
+      $datadir                  = '/var/lib/pgsql/data/'
+      $pg_hba_conf_path         = '/var/lib/pgsql/data/pg_hba.conf'
+      $postgresql_conf_path     = '/var/lib/pgsql/data/postgresql.conf'
       $firewall_supported       = true
       $persist_firewall_command = '/sbin/iptables-save > /etc/sysconfig/iptables'