diff --git a/java/common/org/linphone/core/LinphoneCore.java b/java/common/org/linphone/core/LinphoneCore.java
index 422c0e5a0..22a660302 100644
--- a/java/common/org/linphone/core/LinphoneCore.java
+++ b/java/common/org/linphone/core/LinphoneCore.java
@@ -164,6 +164,11 @@ public interface LinphoneCore {
 	 *
 	 */
 	public void setNetworkStateReachable(boolean isReachable);
+	/**
+	 * 
+	 * @return if false, there is no network connection.
+	 */
+	public boolean setNetworkStateReachable();
 	/**
 	 * destroy linphone core and free all underlying resources
 	 */