diff --git a/lib/versioning/index.js b/lib/versioning/index.js
index 1619f98b56d29e141d7ef2fb0b450a81c00b005c..e179235b124415023daf0964d5447299754a301c 100644
--- a/lib/versioning/index.js
+++ b/lib/versioning/index.js
@@ -7,9 +7,13 @@ const schemes = {
 };
 
 module.exports = function getVersionScheme(versionScheme) {
+  if (!versionScheme) {
+    logger.debug('Missing versionScheme');
+    return semver;
+  }
   const scheme = schemes[versionScheme];
   if (!scheme) {
-    logger.warn({ versionScheme }, 'Unknown verion scheme');
+    logger.warn({ versionScheme }, 'Unknown version scheme');
     return semver;
   }
   return scheme;