diff --git a/packages/brick_offline_first_build/test/offline_first_generator/test_primitive_fields.dart b/packages/brick_offline_first_build/test/offline_first_generator/test_primitive_fields.dart
index f56339fa..8f96ec00 100644
--- a/packages/brick_offline_first_build/test/offline_first_generator/test_primitive_fields.dart
+++ b/packages/brick_offline_first_build/test/offline_first_generator/test_primitive_fields.dart
@@ -175,7 +175,8 @@ Future<Map<String, dynamic>> _$PrimitiveFieldsToSqlite(PrimitiveFields instance,
     'nullable_set': instance.nullableSet == null
         ? null
         : jsonEncode(instance.nullableSet.toList()),
-    'nullable_map': jsonEncode(instance.nullableMap ?? {}),
+    'nullable_map':
+        instance.nullableMap != null ? jsonEncode(instance.nullableMap) : null,
     'nullable_longer_camelized_variable':
         instance.nullableLongerCamelizedVariable,
     'nullable_casing': instance.nullableCasing != null
diff --git a/packages/brick_sqlite/CHANGELOG.md b/packages/brick_sqlite/CHANGELOG.md
index 03601644..dd3c874d 100644
--- a/packages/brick_sqlite/CHANGELOG.md
+++ b/packages/brick_sqlite/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Unreleased
 
+## 3.2.2
+
+- Fix: nullable maps are not cast to a default value on serialization (#531)
+
 ## 3.2.1
 
 - Remove `dart:io` dependency
diff --git a/packages/brick_sqlite/pubspec.yaml b/packages/brick_sqlite/pubspec.yaml
index 45465e01..12eb20f9 100644
--- a/packages/brick_sqlite/pubspec.yaml
+++ b/packages/brick_sqlite/pubspec.yaml
@@ -4,7 +4,7 @@ homepage: https://github.com/GetDutchie/brick/tree/main/packages/brick_sqlite
 issue_tracker: https://github.com/GetDutchie/brick/issues
 repository: https://github.com/GetDutchie/brick
 
-version: 3.2.1
+version: 3.2.2
 
 environment:
   sdk: ">=2.18.0 <4.0.0"
diff --git a/packages/brick_sqlite_generators/CHANGELOG.md b/packages/brick_sqlite_generators/CHANGELOG.md
index 68770898..7e828e7d 100644
--- a/packages/brick_sqlite_generators/CHANGELOG.md
+++ b/packages/brick_sqlite_generators/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Unreleased
 
+## 3.3.1
+
+- Fix: nullable maps are not cast to a default value on serialization (#531)
+
 ## 3.3.0
 
 - Upgrade `brick_core` to `1.3.0`
diff --git a/packages/brick_sqlite_generators/lib/src/sqlite_serialize.dart b/packages/brick_sqlite_generators/lib/src/sqlite_serialize.dart
index a15fcd7e..309e49a9 100644
--- a/packages/brick_sqlite_generators/lib/src/sqlite_serialize.dart
+++ b/packages/brick_sqlite_generators/lib/src/sqlite_serialize.dart
@@ -205,8 +205,10 @@ class SqliteSerialize<_Model extends SqliteModel> extends SqliteSerdesGenerator<
 
       // Map
     } else if (checker.isMap) {
-      final nullableSuffix = checker.isNullable ? ' ?? {}' : '';
-      return 'jsonEncode($fieldValue$nullableSuffix)';
+      if (checker.isNullable) {
+        return '$fieldValue != null ? jsonEncode($fieldValue) : null';
+      }
+      return 'jsonEncode($fieldValue)';
     } else if (checker.toJsonMethod != null) {
       final nullableSuffix = checker.isNullable ? '!' : '';
       final output = 'jsonEncode($fieldValue$nullableSuffix.toJson())';
diff --git a/packages/brick_sqlite_generators/pubspec.yaml b/packages/brick_sqlite_generators/pubspec.yaml
index a6cdf249..4052ba91 100644
--- a/packages/brick_sqlite_generators/pubspec.yaml
+++ b/packages/brick_sqlite_generators/pubspec.yaml
@@ -4,7 +4,7 @@ homepage: https://github.com/GetDutchie/brick/tree/main/packages/brick_sqlite_ge
 issue_tracker: https://github.com/GetDutchie/brick/issues
 repository: https://github.com/GetDutchie/brick
 
-version: 3.3.0+1
+version: 3.3.1
 
 environment:
   sdk: ">=2.18.0 <4.0.0"
diff --git a/packages/brick_sqlite_generators/test/sqlite_model_serdes_generator/test_all_field_types.dart b/packages/brick_sqlite_generators/test/sqlite_model_serdes_generator/test_all_field_types.dart
index a8924c98..c418ba10 100644
--- a/packages/brick_sqlite_generators/test/sqlite_model_serdes_generator/test_all_field_types.dart
+++ b/packages/brick_sqlite_generators/test/sqlite_model_serdes_generator/test_all_field_types.dart
@@ -23,12 +23,16 @@ Future<AllFieldTypes> _$AllFieldTypesFromSqlite(Map<String, dynamic> data,
           .whereType<Casing>()
           .toList()
           .cast<Casing>(),
+      longerCamelizedVariable: data['longer_camelized_variable'] == null
+          ? null
+          : data['longer_camelized_variable'] as String?,
+      map: jsonDecode(data['map']),
       nullableList: data['nullable_list'] == null
           ? null
           : jsonDecode(data['nullable_list']).toList().cast<int>(),
-      longerCamelizedVariable: data['longer_camelized_variable'] == null
+      nullableMap: data['nullable_map'] == null
           ? null
-          : data['longer_camelized_variable'] as String?,
+          : jsonDecode(data['nullable_map']),
       string: data['string'] == null ? null : data['string'] as String?,
       stringSet: jsonDecode(data['string_set']).toSet().cast<String>())
     ..primaryKey = data['_brick_id'] as int;
@@ -46,10 +50,13 @@ Future<Map<String, dynamic>> _$AllFieldTypesToSqlite(AllFieldTypes instance,
         : null,
     'enum_list': jsonEncode(
         instance.enumList.map((s) => Casing.values.indexOf(s)).toList()),
+    'longer_camelized_variable': instance.longerCamelizedVariable,
+    'map': jsonEncode(instance.map),
     'nullable_list': instance.nullableList == null
         ? null
         : jsonEncode(instance.nullableList),
-    'longer_camelized_variable': instance.longerCamelizedVariable,
+    'nullable_map':
+        instance.nullableMap != null ? jsonEncode(instance.nullableMap) : null,
     'string': instance.string,
     'string_set': jsonEncode(instance.stringSet.toList())
   };
@@ -97,17 +104,29 @@ class AllFieldTypesAdapter extends SqliteAdapter<AllFieldTypes> {
       iterable: true,
       type: Casing,
     ),
+    'longerCamelizedVariable': const RuntimeSqliteColumnDefinition(
+      association: false,
+      columnName: 'longer_camelized_variable',
+      iterable: false,
+      type: String,
+    ),
+    'map': const RuntimeSqliteColumnDefinition(
+      association: false,
+      columnName: 'map',
+      iterable: false,
+      type: Map,
+    ),
     'nullableList': const RuntimeSqliteColumnDefinition(
       association: false,
       columnName: 'nullable_list',
       iterable: true,
       type: int,
     ),
-    'longerCamelizedVariable': const RuntimeSqliteColumnDefinition(
+    'nullableMap': const RuntimeSqliteColumnDefinition(
       association: false,
-      columnName: 'longer_camelized_variable',
+      columnName: 'nullable_map',
       iterable: false,
-      type: String,
+      type: Map,
     ),
     'string': const RuntimeSqliteColumnDefinition(
       association: false,
@@ -154,8 +173,10 @@ class AllFieldTypes {
     this.dub,
     this.enumField,
     required this.enumList,
-    this.nullableList,
     this.longerCamelizedVariable,
+    this.nullableList,
+    this.nullableMap,
+    required this.map,
     this.string,
     required this.stringSet,
   });
@@ -165,8 +186,10 @@ class AllFieldTypes {
   final double? dub;
   final Casing? enumField;
   final List<Casing> enumList;
-  final List<int>? nullableList;
   final String? longerCamelizedVariable;
+  final Map<String, dynamic> map;
+  final List<int>? nullableList;
+  final Map<String, dynamic>? nullableMap;
   final String? string;
   final Set<String> stringSet;
 }