diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 87454b2..bb84207 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -569,6 +569,7 @@
     return( 0 );
 }
 
+#if !defined(MBEDTLS_SSL_CONF_SINGLE_HASH)
 static int ssl_sig_hashes_for_test[] = {
 #if defined(MBEDTLS_SHA512_C)
     MBEDTLS_MD_SHA512,
@@ -584,6 +585,7 @@
 #endif
     MBEDTLS_MD_NONE
 };
+#endif /* !MBEDTLS_SSL_CONF_SINGLE_HASH */
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
 /*
@@ -1693,7 +1695,9 @@
     {
         crt_profile_for_test.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 );
         mbedtls_ssl_conf_cert_profile( &conf, &crt_profile_for_test );
+#if !defined(MBEDTLS_SSL_CONF_SINGLE_HASH)
         mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test );
+#endif
     }
 
     mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 9cca9c4..42b9773 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1000,7 +1000,8 @@
 }
 #endif
 
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
+#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
+    !defined(MBEDTLS_SSL_CONF_SINGLE_HASH)
 static int ssl_sig_hashes_for_test[] = {
 #if defined(MBEDTLS_SHA512_C)
     MBEDTLS_MD_SHA512,
@@ -1016,7 +1017,7 @@
 #endif
     MBEDTLS_MD_NONE
 };
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
+#endif /* MBEDTLS_X509_CRT_PARSE_C && !defined(MBEDTLS_SSL_CONF_SINGLE_HASH) */
 
 /** Return true if \p ret is a status code indicating that there is an
  * operation in progress on an SSL connection, and false if it indicates
@@ -2516,7 +2517,9 @@
     {
         crt_profile_for_test.allowed_mds |= MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 );
         mbedtls_ssl_conf_cert_profile( &conf, &crt_profile_for_test );
+#if !defined(MBEDTLS_SSL_CONF_SINGLE_HASH)
         mbedtls_ssl_conf_sig_hashes( &conf, ssl_sig_hashes_for_test );
+#endif
     }
 #endif /* MBEDTLS_X509_CRT_PARSE_C */