gistfile.patch

diff --git a/index.js b/index.js
index f17d484..c30c2cd 100644
--- a/index.js
+++ b/index.js
@@ -347,7 +347,7 @@ module.exports.checkData = checkData
 function checkData (data, sri, opts) {
   opts = ssriOpts(opts)
   sri = parse(sri, opts)
-  if (!Object.keys(sri).length) {
+  if (!sri || !Object.keys(sri).length) {
     if (opts.error) {
       throw Object.assign(
         new Error('No valid integrity hashes to check against'), {
@@ -385,6 +385,14 @@ function checkData (data, sri, opts) {
 module.exports.checkStream = checkStream
 function checkStream (stream, sri, opts) {
   opts = ssriOpts(opts)
+  sri = parse(sri, opts)
+  if (!sri || !Object.keys(sri).length) {
+    return Promise.reject(Object.assign(
+      new Error('No valid integrity hashes to check against'), {
+        code: 'EINTEGRITY'
+      }
+    ))
+  }
   opts.integrity = sri
   const checker = integrityStream(opts)
   return new Promise((resolve, reject) => {