diff --git a/java/impl/org/linphone/core/LinphoneCoreFactoryImpl.java b/java/impl/org/linphone/core/LinphoneCoreFactoryImpl.java
index 3b242e00a..d2f635d4d 100644
--- a/java/impl/org/linphone/core/LinphoneCoreFactoryImpl.java
+++ b/java/impl/org/linphone/core/LinphoneCoreFactoryImpl.java
@@ -97,7 +97,9 @@ public class LinphoneCoreFactoryImpl extends LinphoneCoreFactory {
 			String userConfig, String factoryConfig, Object userdata)
 			throws LinphoneCoreException {
 		try {
-			return new LinphoneCoreImpl(listener,new File(userConfig),new File(factoryConfig),userdata);
+			File user = userConfig == null ? null : new File(userConfig);
+			File factory = factoryConfig == null ? null : new File(factoryConfig);
+			return new LinphoneCoreImpl(listener, user, factory, userdata);
 		} catch (IOException e) {
 			throw new LinphoneCoreException("Cannot create LinphoneCore",e);
 		}
diff --git a/java/impl/org/linphone/core/LinphoneCoreImpl.java b/java/impl/org/linphone/core/LinphoneCoreImpl.java
index 887c9d3da..f5740ff41 100644
--- a/java/impl/org/linphone/core/LinphoneCoreImpl.java
+++ b/java/impl/org/linphone/core/LinphoneCoreImpl.java
@@ -145,12 +145,14 @@ class LinphoneCoreImpl implements LinphoneCore {
 	private native void setChatDatabasePath(long nativePtr, String path);
 	private native long[] getChatRooms(long nativePtr);
 	
-	LinphoneCoreImpl(LinphoneCoreListener listener, File userConfig,File factoryConfig,Object  userdata) throws IOException {
-		mListener=listener;
-		nativePtr = newLinphoneCore(listener,userConfig.getCanonicalPath(),factoryConfig.getCanonicalPath(),userdata);
+	LinphoneCoreImpl(LinphoneCoreListener listener, File userConfig, File factoryConfig, Object userdata) throws IOException {
+		mListener = listener;
+		String user = userConfig == null ? null : userConfig.getCanonicalPath();
+		String factory = factoryConfig == null ? null : factoryConfig.getCanonicalPath();
+		nativePtr = newLinphoneCore(listener, user, factory, userdata);
 	}
 	LinphoneCoreImpl(LinphoneCoreListener listener) throws IOException {
-		mListener=listener;
+		mListener = listener;
 		nativePtr = newLinphoneCore(listener,null,null,null);
 	}
 	
diff --git a/java/impl/org/linphone/core/LinphoneProxyConfigImpl.java b/java/impl/org/linphone/core/LinphoneProxyConfigImpl.java
index a62db0b85..b2e019cb4 100644
--- a/java/impl/org/linphone/core/LinphoneProxyConfigImpl.java
+++ b/java/impl/org/linphone/core/LinphoneProxyConfigImpl.java
@@ -37,6 +37,7 @@ class LinphoneProxyConfigImpl implements LinphoneProxyConfig {
 		nativePtr = newLinphoneProxyConfig();
 		setIdentity(identity);
 		setProxy(proxy);
+		setRoute(route);
 		enableRegister(enableRegister);
 		ownPtr=true;
 	}