diff --git a/pkgs/stack_trace/CHANGELOG.md b/pkgs/stack_trace/CHANGELOG.md
index 9e31d68..53f5cd1 100644
--- a/pkgs/stack_trace/CHANGELOG.md
+++ b/pkgs/stack_trace/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.2.4
+
+* Fix a type annotation in `LazyTrace`.
+
 ## 1.2.3
 
 * Fix a crash in `Chain.parse`.
diff --git a/pkgs/stack_trace/lib/src/lazy_trace.dart b/pkgs/stack_trace/lib/src/lazy_trace.dart
index 21bb67f..6bfe51c 100644
--- a/pkgs/stack_trace/lib/src/lazy_trace.dart
+++ b/pkgs/stack_trace/lib/src/lazy_trace.dart
@@ -27,7 +27,7 @@
   List<Frame> get frames => _trace.frames;
   StackTrace get vmTrace => _trace.vmTrace;
   Trace get terse => new LazyTrace(() => _trace.terse);
-  Trace foldFrames(bool predicate(frame), {bool terse: false}) =>
+  Trace foldFrames(bool predicate(Frame frame), {bool terse: false}) =>
     new LazyTrace(() => _trace.foldFrames(predicate, terse: terse));
   String toString() => _trace.toString();
 
diff --git a/pkgs/stack_trace/pubspec.yaml b/pkgs/stack_trace/pubspec.yaml
index 499b27e..296cd2c 100644
--- a/pkgs/stack_trace/pubspec.yaml
+++ b/pkgs/stack_trace/pubspec.yaml
@@ -7,7 +7,7 @@
 #
 # When the major version is upgraded, you *must* update that version constraint
 # in pub to stay in sync with this.
-version: 1.2.3
+version: 1.2.4
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://github.com/dart-lang/stack_trace
 description: >