diff --git a/tools/cert_create/src/ext.c b/tools/cert_create/src/ext.c
index 8ae6640..055ddbf 100644
--- a/tools/cert_create/src/ext.c
+++ b/tools/cert_create/src/ext.c
@@ -166,7 +166,7 @@
 	int sz;
 
 	/* OBJECT_IDENTIFIER with hash algorithm */
-	algorithm = OBJ_nid2obj(md->type);
+	algorithm = OBJ_nid2obj(EVP_MD_type(md));
 	if (algorithm == NULL) {
 		return NULL;
 	}