diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 4023854..f2f08c7 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -7043,7 +7043,7 @@
     MBEDTLS_MD_SHA256,
     MBEDTLS_MD_SHA224,
 #endif
-#if defined(MBEDTLS_SHA1_C)
+#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1)
     MBEDTLS_MD_SHA1,
 #endif
     MBEDTLS_MD_NONE