diff --git a/CHANGELOG.md b/CHANGELOG.md
index a70bc44..531a6d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.10.0+1
+
+* Remove an unnecessary warning printed when the "file" field is missing from a
+  Json formatted source map. This field is optional and its absence is not
+  unusual.
+
 ## 0.10.0
 
 * Remove the `Span`, `Location` and `SourceFile` classes. Use the
diff --git a/lib/parser.dart b/lib/parser.dart
index d67a65e..369c27d 100644
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -31,10 +31,6 @@
         'Only version 3 is supported.');
   }
 
-  if (!map.containsKey('file')) {
-    print('warning: missing "file" entry in source map');
-  }
-
   if (map.containsKey('sections')) {
     if (map.containsKey('mappings') || map.containsKey('sources') ||
         map.containsKey('names')) {
diff --git a/pubspec.yaml b/pubspec.yaml
index 4af996e..2751034 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: source_maps
-version: 0.10.0
+version: 0.10.0+1
 author: Dart Team <misc@dartlang.org>
 description: Library to programmatically manipulate source map files.
 homepage: http://www.dartlang.org