diff --git a/src/cxx/foundation_pEp_jniadapter_AbstractEngine.cc b/src/cxx/foundation_pEp_jniadapter_AbstractEngine.cc
index 1b7498e..31b5fd2 100644
--- a/src/cxx/foundation_pEp_jniadapter_AbstractEngine.cc
+++ b/src/cxx/foundation_pEp_jniadapter_AbstractEngine.cc
@@ -42,6 +42,7 @@ jclass passphraseTypeClass = nullptr;
 namespace JNISync {
     JNIEnv* env() {
         JNIEnv *thread_env = nullptr;
+        Adapter::session.initialize();
         int status = jvm->GetEnv(reinterpret_cast<void**>(&thread_env), JNI_VERSION_1_6);
         if (status < 0) {
 #ifdef ANDROID