diff --git a/src/gen_cpp_Engine.ysl2 b/src/gen_cpp_Engine.ysl2
index 4222d19..0322d46 100644
--- a/src/gen_cpp_Engine.ysl2
+++ b/src/gen_cpp_Engine.ysl2
@@ -192,6 +192,7 @@ tstylesheet {
     }
 
     template "parm", mode=in {
+        const "dir", "name(*[1])";
         const "type", "name(*[2])";
         const "name", "name(*[3])";
 
@@ -202,8 +203,10 @@ tstylesheet {
                 | √$type _«$name» = to_«$type»(env, «$name»);
             when "$type='bool'"
                 | bool _«$name» = (bool) «$name»;
-            when "$type='int'"
+            when "$type='int' and $dir='in'"
                 | int _«$name» = (int) «$name»;
+            when "$type='int' and $dir='inout'"
+                | √$type _«$name» = to_Integer(env, «$name»);
             otherwise
                 | √$type *_«$name» = to_«$type»(env, «$name»);
         }
@@ -237,8 +240,10 @@ tstylesheet {
                 value "*[3]";
             when "($dir = 'creates' or $dir = 'returns') and $type='sstring'"
                 > &_«$name», &_«$name»_size
-            when "$dir = 'creates' or $dir = 'returns'" 
+            when "$dir = 'creates' or $dir = 'returns'"
                 > &_«$name»
+            when "$dir = 'inout' and $type='int'"
+                > (unsigned int *) &_«$name»
             otherwise 
                 > _«$name»
         }
@@ -257,7 +262,7 @@ tstylesheet {
 
     template "parm", mode=sig {
         const "name", "name(*[3])";
-        > ,\n        `call "jni_type" with "type", "name(*[2])"` «$name»
+        > ,\n        `call "jni_type" with "type", "name(*[2])", with "dir", "name(*[1])"` «$name»
     }
 }
 
diff --git a/src/gen_java_Engine.ysl2 b/src/gen_java_Engine.ysl2
index 328c03a..c702115 100644
--- a/src/gen_java_Engine.ysl2
+++ b/src/gen_java_Engine.ysl2
@@ -242,7 +242,8 @@ tstylesheet {
         indent(0);
 
         if "$public" > public 
-        > †$type «translate($name,'-','_')»
+        call "toJava" with "type", "$type";
+        >  «translate($name,'-','_')»
         choose {
             when "$public" > ;
             otherwise if "position()!=last()" > ,
@@ -259,7 +260,8 @@ tstylesheet {
         indent(0);
 
         if "$public" > public 
-        > ¡$type «translate($name,'-','_')»
+        call "toIntermediate" with "type", "$type", with "dir", "$dir";
+        >  «translate($name,'-','_')»
         choose {
             when "$public" > ;
             otherwise if "position()!=last()" > ,
diff --git a/src/jniutils.cc b/src/jniutils.cc
index 4625c6b..000465b 100644
--- a/src/jniutils.cc
+++ b/src/jniutils.cc
@@ -186,6 +186,26 @@ namespace pEp {
             return env->ThrowNew(ex, ex_name);
         }
 
+        jobject from_Integer(JNIEnv *env, int val)
+        {
+            assert(env);
+            jclass clazz = findClass(env, "java/lang/Integer");
+            jmethodID constructor = env->GetMethodID(clazz, "<init>", "(I)V");
+            assert(constructor);
+            jobject obj = env->NewObject(clazz, constructor, val);
+            assert(obj);
+
+            env->DeleteLocalRef(clazz);
+            return obj;
+        }
+
+        int to_Integer(JNIEnv *env, jobject obj)
+        {
+            assert(env && obj);
+            int _val = callIntMethod(env, obj, "intValue");
+            return _val;
+        }
+
         jbyteArray from_string(JNIEnv *env, const char *str)
         {
             if (str && str[0]) {
diff --git a/src/jniutils.hh b/src/jniutils.hh
index 75a7db5..55e613c 100644
--- a/src/jniutils.hh
+++ b/src/jniutils.hh
@@ -151,6 +151,9 @@ namespace pEp {
 
         jint outOfMemory(JNIEnv *env);
 
+        jobject from_Integer(JNIEnv *env, int val);
+        int to_Integer(JNIEnv *env, jobject obj);
+
         jbyteArray from_string(JNIEnv *env, const char *str);
         char *to_string(JNIEnv *env, jbyteArray str);
 
diff --git a/src/pEp.yml2 b/src/pEp.yml2
index ac6a8f9..ac6dad4 100644
--- a/src/pEp.yml2
+++ b/src/pEp.yml2
@@ -174,8 +174,7 @@ namespace pEp {
                 creates message dst,
                 creates stringlist keylist,
                 returns Rating rating,
-                /* TODO replace with int, this is a OR of multipla DecryptFlags */
-                returns DecryptFlags flags
+                inout int flags
             );
 
         method re_evaluate_message_rating(
diff --git a/src/types_c.ysl2 b/src/types_c.ysl2
index 6b16ed9..a313a18 100644
--- a/src/types_c.ysl2
+++ b/src/types_c.ysl2
@@ -22,12 +22,14 @@ function "toC" {
 
 function "jni_type" {
     param "type";
+    param "dir";
 
     choose {
         when "../enum[@name=$type]" > jint
         when "$type = 'string' or $type = 'sstring'" > jbyteArray
         when "$type='bool'" > jboolean
-        when "$type='int'" > jint
+        when "$type='int' and $dir!='inout'" > jint
+        when "$type='int' and $dir='inout'" > jobject
         otherwise > jobject
     }
 }
diff --git a/src/types_java.ysl2 b/src/types_java.ysl2
index de0029d..a96cc89 100644
--- a/src/types_java.ysl2
+++ b/src/types_java.ysl2
@@ -35,6 +35,7 @@ function "toSig" {
             > L
             choose {
                 when "$type='timestamp'" > java/util/Date
+                when "$type='int'" > java/lang/Integer
 
                 when "$type='identity'" > org/pEp/jniadapter/_Identity
                 when "$type='message'" > org/pEp/jniadapter/Message
@@ -58,10 +59,12 @@ function "toSig" {
 
 function "toIntermediate" {
     param "type";
+    param "dir";
 
     choose {
         when "$type='bool'" > boolean
-        when "$type='int'" > int
+        when "$type='int' and $dir!='inout'" > int
+        when "$type='int' and $dir='inout'" > Integer
         when "$type='string' or $type='sstring'" > byte[]
 
         when "$type='bloblist'" > Vector<_Blob>