diff --git a/library/md_wrap.h b/library/md_wrap.h
index bfe6537..51655f9 100644
--- a/library/md_wrap.h
+++ b/library/md_wrap.h
@@ -72,8 +72,10 @@
 #if defined(MBEDTLS_SHA1_C)
 extern const mbedtls_md_info_t mbedtls_sha1_info;
 #endif
-#if defined(MBEDTLS_SHA256_C)
+#if defined(MBEDTLS_SHA224_C)
 extern const mbedtls_md_info_t mbedtls_sha224_info;
+#endif
+#if defined(MBEDTLS_SHA256_C)
 extern const mbedtls_md_info_t mbedtls_sha256_info;
 #endif
 #if defined(MBEDTLS_SHA384_C)