diff --git a/include/media/MediaPlayerInterface.h b/include/media/MediaPlayerInterface.h
index 0e815cb..4e18f1f 100644
--- a/include/media/MediaPlayerInterface.h
+++ b/include/media/MediaPlayerInterface.h
@@ -280,6 +280,34 @@
         return INVALID_OPERATION;
     }
 
+    // ModDrm
+    virtual status_t prepareDrm(const uint8_t uuid[16], const int mode) {
+        return INVALID_OPERATION;
+    }
+    virtual status_t releaseDrm() {
+        return INVALID_OPERATION;
+    }
+    virtual status_t getKeyRequest(Vector<uint8_t> const& scope, String8 const& mimeType,
+                             DrmPlugin::KeyType keyType,
+                             KeyedVector<String8, String8>& optionalParameters,
+                             Vector<uint8_t>& request, String8& defaultUrl,
+                             DrmPlugin::KeyRequestType& keyRequestType) {
+        return INVALID_OPERATION;
+    }
+    virtual status_t provideKeyResponse(Vector<uint8_t>& releaseKeySetId,
+                             Vector<uint8_t>& response, Vector<uint8_t>& keySetId) {
+        return INVALID_OPERATION;
+    }
+    virtual status_t restoreKeys(Vector<uint8_t> const& keySetId) {
+        return INVALID_OPERATION;
+    }
+    virtual status_t getDrmPropertyString(String8 const& name, String8& value) {
+        return INVALID_OPERATION;
+    }
+    virtual status_t setDrmPropertyString(String8 const& name, String8 const& value) {
+        return INVALID_OPERATION;
+    }
+
 private:
     friend class MediaPlayerService;