diff --git a/java/common/org/linphone/core/LinphoneCore.java b/java/common/org/linphone/core/LinphoneCore.java
index d74997d52..b001f0a6f 100644
--- a/java/common/org/linphone/core/LinphoneCore.java
+++ b/java/common/org/linphone/core/LinphoneCore.java
@@ -275,4 +275,7 @@ public interface LinphoneCore {
 	 * @return {@link LinphoneChatRoom} where messaging can take place.
 	 */
 	LinphoneChatRoom createChatRoom(String to);
+	
+	public void setVideoWindow(VideoWindow w);
+	public void setPreviewWindow(VideoWindow w);
 }
diff --git a/java/common/org/linphone/core/VideoWindow.java b/java/common/org/linphone/core/VideoWindow.java
new file mode 100644
index 000000000..d4a46b931
--- /dev/null
+++ b/java/common/org/linphone/core/VideoWindow.java
@@ -0,0 +1,5 @@
+package org.linphone.core;
+
+public interface VideoWindow {
+
+}