diff --git a/src/network/crypto_mbedtls.hpp b/src/network/crypto_mbedtls.hpp
index 2166282e0..774471190 100644
--- a/src/network/crypto_mbedtls.hpp
+++ b/src/network/crypto_mbedtls.hpp
@@ -114,6 +114,8 @@ public:
         assert(iv.size() == 12);
         std::copy_n(iv.begin(), 12, m_iv.begin());
         m_packet_counter = 0;
+        mbedtls_gcm_init(&m_aes_encrypt_context);
+        mbedtls_gcm_init(&m_aes_decrypt_context);
         mbedtls_gcm_setkey(&m_aes_encrypt_context, MBEDTLS_CIPHER_ID_AES,
             key.data(), key.size() * 8);
         mbedtls_gcm_setkey(&m_aes_decrypt_context, MBEDTLS_CIPHER_ID_AES,