diff --git a/features/lorawan/lorastack/mac/LoRaMacCrypto.cpp b/features/lorawan/lorastack/mac/LoRaMacCrypto.cpp
index c7fa346364..b5cb99e63a 100644
--- a/features/lorawan/lorastack/mac/LoRaMacCrypto.cpp
+++ b/features/lorawan/lorastack/mac/LoRaMacCrypto.cpp
@@ -31,7 +31,6 @@
 #include "system/lorawan_data_structures.h"
 #include "mbedtls/platform.h"
 
-
 #if defined(MBEDTLS_CMAC_C) && defined(MBEDTLS_AES_C) && defined(MBEDTLS_CIPHER_C)
 
 LoRaMacCrypto::LoRaMacCrypto()
@@ -360,7 +359,6 @@ int LoRaMacCrypto::compute_join_server_keys(const uint8_t *key, uint32_t key_len
     if (0 != ret)
         goto exit;
 
-    mbedtls_aes_free(&aes_ctx);
     memset(nonce, 0, sizeof(nonce));
     nonce[0] = 0x06;
     memcpy(nonce + 1, eui, 8);