diff --git a/lib/index.js b/lib/index.js
index fec3716..60d9dfe 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -77,7 +77,7 @@ var flatten = function(options) {
         licenseFile = path.join(json.path, filename);
         // Checking that the file is in fact a normal file and not a directory for example.
         if (fs.lstatSync(licenseFile).isFile()) {
-            if (moduleInfo.licenses.indexOf(UNKNOWN) > -1) {
+            if (!moduleInfo.licenses || moduleInfo.licenses.indexOf(UNKNOWN) > -1) {
                 //Only re-check the license if we didn't get it from elsewhere
                 moduleInfo.licenses = license(fs.readFileSync(licenseFile, {encoding: 'utf8'}));
             }