diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47c0cb5..ae90612 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+## 0.13.4
+
+* By default, only the first line of a command's description is included in its
+  parent runner's usage string. This returns to the default behavior from
+  before 0.13.3+1.
+
+* A `Command.summary` getter has been added to explicitly control the summary
+  that appears in the parent runner's usage string. This getter defaults to the
+  first line of the description, but can be overridden if the user wants a
+  multi-line summary.
+
 ## 0.13.3+6
 
 * README fixes.
diff --git a/lib/command_runner.dart b/lib/command_runner.dart
index 3cc952e..d0cbf26 100644
--- a/lib/command_runner.dart
+++ b/lib/command_runner.dart
@@ -190,9 +190,15 @@
   /// The name of this command.
   String get name;
 
-  /// A short description of this command.
+  /// A description of this command, included in [usage].
   String get description;
 
+  /// A short description of this command, included in [parent]'s
+  /// [CommandRunner.usage].
+  ///
+  /// This defaults to the first line of [description].
+  String get summary => description.split("\n").first;
+
   /// A single-line template for how to invoke this command (e.g. `"pub get
   /// [package]"`).
   String get invocation {
@@ -371,7 +377,7 @@
   var buffer =
       new StringBuffer('Available ${isSubcommand ? "sub" : ""}commands:');
   for (var name in names) {
-    var lines = commands[name].description.split("\n");
+    var lines = commands[name].summary.split("\n");
     buffer.writeln();
     buffer.write('  ${padRight(name, length)}   ${lines.first}');
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 128dd7f..38b5654 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: args
-version: 0.13.3+6
+version: 0.13.4
 author: "Dart Team <misc@dartlang.org>"
 homepage: https://github.com/dart-lang/args
 description: >
diff --git a/test/command_runner_test.dart b/test/command_runner_test.dart
index bccc7b3..9961e7d 100644
--- a/test/command_runner_test.dart
+++ b/test/command_runner_test.dart
@@ -54,7 +54,7 @@
 Run "test help <command>" for more information about a command."""));
     });
 
-    test("supports newlines in command descriptions", () {
+    test("truncates newlines in command descriptions by default", () {
       runner.addCommand(new MultilineCommand());
 
       expect(runner.usage, equals("""
@@ -68,6 +68,24 @@
 Available commands:
   help        Display help information for test.
   multiline   Multi
+
+Run "test help <command>" for more information about a command."""));
+    });
+
+    test("supports newlines in command summaries", () {
+      runner.addCommand(new MultilineSummaryCommand());
+
+      expect(runner.usage, equals("""
+A test command runner.
+
+Usage: test <command> [arguments]
+
+Global options:
+-h, --help    Print this usage information.
+
+Available commands:
+  help        Display help information for test.
+  multiline   Multi
               line.
 
 Run "test help <command>" for more information about a command."""));
diff --git a/test/utils.dart b/test/utils.dart
index 4ecc502..1fd8468 100644
--- a/test/utils.dart
+++ b/test/utils.dart
@@ -39,6 +39,10 @@
   }
 }
 
+class MultilineSummaryCommand extends MultilineCommand {
+  String get summary => description;
+}
+
 class HiddenCommand extends Command {
   var hasRun = false;