diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 4a3c9fe..560ef4c 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -6513,7 +6513,7 @@
         if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) )
             ret = mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id );
 
-        mbedtls_x509_crt_pk_release( chain, pk );
+        mbedtls_x509_crt_pk_release( chain );
 
         if( ret != 0 )
         {