diff --git a/android/src/org/pEp/jniadapter/AndroidHelper.java b/android/src/org/pEp/jniadapter/AndroidHelper.java
index 265f1a3..68ee55d 100644
--- a/android/src/org/pEp/jniadapter/AndroidHelper.java
+++ b/android/src/org/pEp/jniadapter/AndroidHelper.java
@@ -29,7 +29,7 @@ public class AndroidHelper {
     private static File tmpDir;
         
     // TODO : Increment when needed.
-    public static int ENGINE_VERSION_CODE = 989;
+    public static int ENGINE_VERSION_CODE = 1028;
 
     private static File shareDir;
 
diff --git a/src/basic_api.cc b/src/basic_api.cc
index 7927a8f..b2b315b 100644
--- a/src/basic_api.cc
+++ b/src/basic_api.cc
@@ -179,6 +179,18 @@ JNIEXPORT void JNICALL Java_org_pEp_jniadapter_Engine_config_1passive_1mode(
     ::config_passive_mode(session, (bool)enable);
 }
 
+
+JNIEXPORT void JNICALL Java_org_pEp_jniadapter_Engine_config_unencrypted_subject(
+        JNIEnv *env,
+        jobject obj,
+        jboolean enable
+    )
+{
+    PEP_SESSION session = (PEP_SESSION) callLongMethod(env, obj, "getHandle");
+
+    ::config_unencrypted_subject(session, (bool)enable);
+}
+
 JNIEXPORT void JNICALL Java_org_pEp_jniadapter_Engine_blacklist_1add(
         JNIEnv *env,
         jobject obj,
diff --git a/src/pEp.yml2 b/src/pEp.yml2
index 492eae6..d0e2d9e 100644
--- a/src/pEp.yml2
+++ b/src/pEp.yml2
@@ -145,7 +145,8 @@ namespace pEp {
         basic void blacklist_delete(string fpr);
         basic bool blacklist_is_listed(string fpr);
         basic void config_passive_mode(bool enable);
-    
+        basic void config_unencrypted_subject(bool enable);
+
     };
 
     struct message {