diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index b8e5e71f4..078d1b506 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -2990,6 +2990,7 @@ extern "C" void Java_org_linphone_core_LinphoneFriendListImpl_setRLSUri(JNIEnv*
 																		,jstring jrlsUri) {
 	const char* uri = env->GetStringUTFChars(jrlsUri, NULL);
 	linphone_friend_list_set_rls_uri((LinphoneFriendList*)ptr,uri);
+        env->ReleaseStringUTFChars(jrlsUri, uri);
 }
 
 extern "C" void Java_org_linphone_core_LinphoneFriendListImpl_addFriend(JNIEnv*  env
@@ -3012,7 +3013,10 @@ extern "C" jlong Java_org_linphone_core_LinphoneFriendListImpl_findFriendByUri(J
 																		,jlong friendListptr
 																		,jstring juri) {
 	const char* uri = env->GetStringUTFChars(juri, NULL);
-	return (jlong)linphone_friend_list_find_friend_by_uri((LinphoneFriendList*)friendListptr,uri);
+        LinphoneFriend* lResult;
+	lResult = linphone_friend_list_find_friend_by_uri((LinphoneFriendList*)friendListptr,uri);
+        env->ReleaseStringUTFChars(juri, uri);
+	return (jlong)lResult;
 }
 
 extern "C" jlong Java_org_linphone_core_LinphoneFriendImpl_getAddress(JNIEnv*  env