diff --git a/CHANGELOG b/CHANGELOG
index 1b53ae59e6..1a8e1460ec 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+=== master
+
+* Support :generated_always_as column option on PostgreSQL 12+ (jeremyevans)
+
 === 5.23.0 (2019-08-01)
 
 * Work around a bug on jdbc-sqlite3 3.27.2.1 when parsing schema for tables with columns with default values (jeremyevans)
diff --git a/lib/sequel/adapters/shared/postgres.rb b/lib/sequel/adapters/shared/postgres.rb
index 8abb43c8d9..46132113c6 100644
--- a/lib/sequel/adapters/shared/postgres.rb
+++ b/lib/sequel/adapters/shared/postgres.rb
@@ -836,10 +836,14 @@ def column_definition_collate_sql(sql, column)
       # default value is given.
       def column_definition_default_sql(sql, column)
         super
-        if !column[:serial] && !['serial', 'bigserial'].include?(column[:type].to_s) && !column[:default] && (identity = column[:identity])
-          sql << " GENERATED "
-          sql << (identity == :always ? "ALWAYS" : "BY DEFAULT")
-          sql << " AS IDENTITY"
+        if !column[:serial] && !['serial', 'bigserial'].include?(column[:type].to_s) && !column[:default]
+          if (identity = column[:identity])
+            sql << " GENERATED "
+            sql << (identity == :always ? "ALWAYS" : "BY DEFAULT")
+            sql << " AS IDENTITY"
+          elsif (generated = column[:generated_always_as])
+            sql << " GENERATED ALWAYS AS (#{literal(generated)}) STORED"
+          end
         end
       end
 
diff --git a/lib/sequel/database/schema_generator.rb b/lib/sequel/database/schema_generator.rb
index 36de900193..27b95bdfb3 100644
--- a/lib/sequel/database/schema_generator.rb
+++ b/lib/sequel/database/schema_generator.rb
@@ -110,6 +110,9 @@ def check(*args, &block)
       #                yet exist on referenced table (but will exist before the transaction commits).
       #                Basically it adds DEFERRABLE INITIALLY DEFERRED on key creation.
       #                If you use :immediate as the value, uses DEFERRABLE INITIALLY IMMEDIATE.
+      # :generated_always_as :: Specify a GENERATED ALWAYS AS column expression,
+      #                         if generated columns are supported (PostgreSQL 12+, MariaDB 5.2.0+,
+      #                         and MySQL 5.7.6+).
       # :index :: Create an index on this column.  If given a hash, use the hash as the
       #           options for the index.
       # :key :: For foreign key columns, the column in the associated table
@@ -132,9 +135,11 @@ def check(*args, &block)
       #            creating a unique index on the column.
       # :unique_constraint_name :: The name to give the unique key constraint
       #
+      # PostgreSQL specific options:
+      #
+      # :identity :: Create an identity column.
+      #
       # MySQL specific options:
-      # :generated_always_as :: Specify a GENERATED ALWAYS AS column expression,
-      #                         if generated columns are supported.
       # :generated_type :: Set the type of column when using :generated_always_as,
       #                    should be :virtual or :stored to force a type.
       def column(name, type, opts = OPTS)
diff --git a/spec/adapters/postgres_spec.rb b/spec/adapters/postgres_spec.rb
index bd74ac8184..0a7f949aa9 100644
--- a/spec/adapters/postgres_spec.rb
+++ b/spec/adapters/postgres_spec.rb
@@ -227,6 +227,12 @@
     @db.convert_serial_to_identity(:tmp_dolls, :column=>:id)
   end if DB.server_version >= 100002 && DB.get{current_setting('is_superuser')} == 'on'
 
+  it "should support creating generated columns" do
+    @db.create_table(:tmp_dolls){Integer :a; Integer :b; Integer :c, :generated_always_as=>Sequel[:a] * 2 + :b + 1}
+    @db[:tmp_dolls].insert(:a=>100, :b=>10)
+    @db[:tmp_dolls].select_order_map([:a, :b, :c]).must_equal [[100, 10, 211]]
+  end if DB.server_version >= 120000
+
   it "should support pg_loose_count extension" do
     @db.extension :pg_loose_count
     @db.create_table(:tmp_dolls){text :name}