diff --git a/lib/grinder_sdk.dart b/lib/grinder_sdk.dart
index 84cc2e4c..7ef67ab1 100644
--- a/lib/grinder_sdk.dart
+++ b/lib/grinder_sdk.dart
@@ -366,6 +366,12 @@ class Dart2js {
 
 /// Utility class for invoking dartdoc.
 class DartDoc {
+  /// Return whether the dartdoc tool exists in this SDK.
+  static bool exists() {
+    File file = new File(sdkBin('dartdoc'));
+    return file.existsSync();
+  }
+
   static void doc() {
     runlib.run(sdkBin('dartdoc'));
   }
diff --git a/tool/grind.dart b/tool/grind.dart
index 4cdc46e2..fc0db4be 100644
--- a/tool/grind.dart
+++ b/tool/grind.dart
@@ -76,7 +76,13 @@ void coverage() {
 void buildbot() => null;
 
 @Task()
-doc() => DartDoc.docAsync();
+doc() {
+  if (DartDoc.exists()) {
+    DartDoc.docAsync();
+  } else {
+    log('Dartdoc is not available in this SDK.');
+  }
+}
 
 @Task()
 ddc() {