diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 1a3217c..f07f9d4 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2297,7 +2297,7 @@
                                    const unsigned char *end, size_t *out_len );
 
 #if defined(MBEDTLS_TEST_HOOKS)
-int ssl_check_dtls_clihlo_cookie(
+int mbedtls_ssl_check_dtls_clihlo_cookie(
                            mbedtls_ssl_context *ssl,
                            const unsigned char *cli_id, size_t cli_id_len,
                            const unsigned char *in, size_t in_len,