diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae83093..a5f41bd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.3.8
+
+* Preserve `?` in initializing formal function-typed parameters (#960).
+
 # 1.3.7
 
 * Split help into verbose and non-verbose lists (#938).
diff --git a/lib/src/cli/formatter_options.dart b/lib/src/cli/formatter_options.dart
index a3f20ba..8fd0d03 100644
--- a/lib/src/cli/formatter_options.dart
+++ b/lib/src/cli/formatter_options.dart
@@ -13,7 +13,7 @@
 import 'summary.dart';
 
 // Note: The following line of code is modified by tool/grind.dart.
-const dartStyleVersion = '1.3.7';
+const dartStyleVersion = '1.3.8';
 
 /// Global options that affect how the formatter produces and uses its outputs.
 class FormatterOptions {
diff --git a/lib/src/source_visitor.dart b/lib/src/source_visitor.dart
index 1f63c6c..1fbdaca 100644
--- a/lib/src/source_visitor.dart
+++ b/lib/src/source_visitor.dart
@@ -1443,6 +1443,7 @@
       token(node.period);
       visit(node.identifier);
       visit(node.parameters);
+      token(node.question);
       _endFormalParameter(node);
     });
   }
diff --git a/pubspec.lock b/pubspec.lock
index ee29188..544b9cc 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -35,21 +35,21 @@
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety"
+    version: "2.5.0-nullsafety.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety"
+    version: "2.1.0-nullsafety.1"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety"
+    version: "1.2.0-nullsafety.1"
   cli_util:
     dependency: transitive
     description:
@@ -63,7 +63,7 @@
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.2"
+    version: "1.15.0-nullsafety.3"
   convert:
     dependency: transitive
     description:
@@ -147,7 +147,7 @@
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.3-nullsafety"
+    version: "0.6.3-nullsafety.1"
   logging:
     dependency: transitive
     description:
@@ -161,14 +161,14 @@
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety"
+    version: "0.12.10-nullsafety.1"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.2"
+    version: "1.3.0-nullsafety.4"
   mime:
     dependency: transitive
     description:
@@ -210,21 +210,21 @@
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety"
+    version: "1.8.0-nullsafety.1"
   pedantic:
     dependency: "direct dev"
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety"
+    version: "1.10.0-nullsafety.1"
   pool:
     dependency: transitive
     description:
       name: pool
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.0-nullsafety"
+    version: "1.5.0-nullsafety.1"
   pub_semver:
     dependency: "direct dev"
     description:
@@ -266,70 +266,70 @@
       name: source_map_stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.1"
+    version: "2.1.0-nullsafety.2"
   source_maps:
     dependency: transitive
     description:
       name: source_maps
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.10-nullsafety"
+    version: "0.10.10-nullsafety.1"
   source_span:
     dependency: "direct main"
     description:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety"
+    version: "1.8.0-nullsafety.2"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety"
+    version: "1.10.0-nullsafety.4"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety"
+    version: "2.1.0-nullsafety.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety"
+    version: "1.1.0-nullsafety.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety"
+    version: "1.2.0-nullsafety.1"
   test:
     dependency: "direct dev"
     description:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.16.0-nullsafety.2"
+    version: "1.16.0-nullsafety.5"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety"
+    version: "0.2.19-nullsafety.2"
   test_core:
     dependency: transitive
     description:
       name: test_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.12-nullsafety.2"
+    version: "0.3.12-nullsafety.5"
   test_descriptor:
     dependency: "direct dev"
     description:
@@ -350,7 +350,7 @@
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.2"
+    version: "1.3.0-nullsafety.3"
   vm_service:
     dependency: transitive
     description:
@@ -387,4 +387,4 @@
     source: hosted
     version: "2.2.1"
 sdks:
-  dart: ">=2.10.0-0 <2.10.0"
+  dart: ">=2.10.0-78 <=2.11.0-edge.67c703063d5b68c9e132edbaf34dfe375851f5a6"
diff --git a/pubspec.yaml b/pubspec.yaml
index 92d9bbe..2f6d6cc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_style
 # Note: See tool/grind.dart for how to bump the version.
-version: 1.3.7
+version: 1.3.8
 description: >-
   Opinionated, automatic Dart source code formatter.
   Provides an API and a CLI tool.
diff --git a/test/regression/0900/0960.unit b/test/regression/0900/0960.unit
new file mode 100644
index 0000000..a098c76
--- /dev/null
+++ b/test/regression/0900/0960.unit
@@ -0,0 +1,18 @@
+>>>
+const m = 0;
+
+class C {
+  var z, w, u, v;
+  C({@m int this.v()?});
+}
+
+void main() {}
+<<<
+const m = 0;
+
+class C {
+  var z, w, u, v;
+  C({@m int this.v()?});
+}
+
+void main() {}
\ No newline at end of file
diff --git a/test/whitespace/functions.unit b/test/whitespace/functions.unit
index 82db3d1..e17e716 100644
--- a/test/whitespace/functions.unit
+++ b/test/whitespace/functions.unit
@@ -174,6 +174,14 @@
 function(
   int? callback()?,
 ) {}
+>>> nullable old style named function typed parameter
+function({int? callback()    ?  }) {}
+<<<
+function({int? callback()?}) {}
+>>> nullable old style initializing formal function typed parameter
+function(int? this.callback()    ?  ) {}
+<<<
+function(int? this.callback()?) {}
 >>> required parameters
 class A {
 f({   required    int a,required   b}) {}