diff --git a/include/mbedtls/md_internal.h b/include/mbedtls/md_internal.h
index 04de482..698477b 100644
--- a/include/mbedtls/md_internal.h
+++ b/include/mbedtls/md_internal.h
@@ -100,7 +100,9 @@
 extern const mbedtls_md_info_t mbedtls_sha1_info;
 #endif
 #if defined(MBEDTLS_SHA256_C)
+#if !defined(MBEDTLS_SHA256_NO_SHA224)
 extern const mbedtls_md_info_t mbedtls_sha224_info;
+#endif
 extern const mbedtls_md_info_t mbedtls_sha256_info;
 #endif
 #if defined(MBEDTLS_SHA512_C)