diff --git a/src/org_pEp_jniadapter_AbstractEngine.cc b/src/org_pEp_jniadapter_AbstractEngine.cc
index 044af59..149aa14 100644
--- a/src/org_pEp_jniadapter_AbstractEngine.cc
+++ b/src/org_pEp_jniadapter_AbstractEngine.cc
@@ -324,7 +324,12 @@ extern "C" {
     {
         sync_thread_arg_t *a = (sync_thread_arg_t*)arg;
         PEP_SESSION session = (PEP_SESSION) a->session;
+        #ifdef ANDROID
+        a->sync_jvm->AttachCurrentThread(&sync_env, NULL);
+        #else
         a->sync_jvm->AttachCurrentThread((void **) &sync_env, NULL);
+        #endif
+
 
         jclass clazz = sync_env->GetObjectClass(sync_obj);