diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index cc7d7e1..95ef032 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -3146,7 +3146,7 @@
 
 #if defined(MBEDTLS_ECDH_C) && \
     ( defined(MBEDTLS_USE_PSA_CRYPTO) || defined(MBEDTLS_SSL_PROTO_TLS1_3) )
-    if( handshake->ecdh_psa_shared_key == 0 )
+    if( handshake->ecdh_psa_privkey_is_external == 0 )
         psa_destroy_key( handshake->ecdh_psa_privkey );
 #endif /* MBEDTLS_ECDH_C && MBEDTLS_USE_PSA_CRYPTO */