diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 29729d4..b8875ab 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1676,6 +1676,8 @@
 
 #endif /* MBEDTLS_SSL_CONF_SINGLE_EC */
 
+#if !defined(MBEDTLS_SSL_CONF_SINGLE_SIG_HASH)
+
 #define MBEDTLS_SSL_BEGIN_FOR_EACH_SIG_HASH( MD_VAR )    \
     {                                                                   \
         int const *__md;                                                \
@@ -1701,4 +1703,25 @@
         }                                                               \
     }
 
+#else /* !MBEDTLS_SSL_CONF_SINGLE_SIG_HASH */
+
+#define MBEDTLS_SSL_BEGIN_FOR_EACH_SIG_HASH( MD_VAR )                   \
+    {                                                                   \
+        mbedtls_md_type_t MD_VAR = MBEDTLS_SSL_CONF_SINGLE_SIG_HASH_MD_ID; \
+        ((void) ssl);
+
+#define MBEDTLS_SSL_END_FOR_EACH_SIG_HASH                               \
+    }
+
+#define MBEDTLS_SSL_BEGIN_FOR_EACH_SIG_HASH_TLS( HASH_VAR )                \
+    {                                                                      \
+        unsigned char HASH_VAR = MBEDTLS_SSL_CONF_SINGLE_SIG_HASH_TLS_ID;  \
+        ((void) ssl);
+
+
+#define MBEDTLS_SSL_END_FOR_EACH_SIG_HASH_TLS                           \
+    }
+
+#endif /* MBEDTLS_SSL_CONF_SINGLE_SIG_HASH */
+
 #endif /* ssl_internal.h */