diff --git a/media/libstagefright/matroska/MatroskaExtractor.cpp b/media/libstagefright/matroska/MatroskaExtractor.cpp
index e1b9991..3ef7b71 100644
--- a/media/libstagefright/matroska/MatroskaExtractor.cpp
+++ b/media/libstagefright/matroska/MatroskaExtractor.cpp
@@ -493,7 +493,8 @@
     : mDataSource(source),
       mReader(new DataSourceReader(mDataSource)),
       mSegment(NULL),
-      mExtractedThumbnails(false) {
+      mExtractedThumbnails(false),
+      mIsWebm(false) {
     off64_t size;
     mIsLiveStreaming =
         (mDataSource->flags()
@@ -507,6 +508,10 @@
         return;
     }
 
+    if (ebmlHeader.m_docType && !strcmp("webm", ebmlHeader.m_docType)) {
+        mIsWebm = true;
+    }
+
     long long ret =
         mkvparser::Segment::CreateInstance(mReader, pos, mSegment);
 
@@ -757,7 +762,10 @@
 
 sp<MetaData> MatroskaExtractor::getMetaData() {
     sp<MetaData> meta = new MetaData;
-    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_MATROSKA);
+
+    meta->setCString(
+            kKeyMIMEType,
+            mIsWebm ? "video/webm" : MEDIA_MIMETYPE_CONTAINER_MATROSKA);
 
     return meta;
 }
diff --git a/media/libstagefright/matroska/MatroskaExtractor.h b/media/libstagefright/matroska/MatroskaExtractor.h
index 38ebd61..1294b4f 100644
--- a/media/libstagefright/matroska/MatroskaExtractor.h
+++ b/media/libstagefright/matroska/MatroskaExtractor.h
@@ -68,6 +68,7 @@
     mkvparser::Segment *mSegment;
     bool mExtractedThumbnails;
     bool mIsLiveStreaming;
+    bool mIsWebm;
 
     void addTracks();
     void findThumbnails();