diff --git a/crypto/ecrdsa.c b/crypto/ecrdsa.c
index 2c0602f0cd40..0cd7eb367604 100644
--- a/crypto/ecrdsa.c
+++ b/crypto/ecrdsa.c
@@ -145,7 +145,7 @@ int ecrdsa_param_curve(void *context, size_t hdrlen, unsigned char tag,
 	struct ecrdsa_ctx *ctx = context;
 
 	ctx->curve_oid = look_up_OID(value, vlen);
-	if (!ctx->curve_oid)
+	if (ctx->curve_oid == OID__NR)
 		return -EINVAL;
 	ctx->curve = get_curve_by_oid(ctx->curve_oid);
 	return 0;