diff --git a/lib/lockfile.js b/lib/lockfile.js
index 97b6637..9710c2d 100644
--- a/lib/lockfile.js
+++ b/lib/lockfile.js
@@ -197,7 +197,9 @@ function setLockAsCompromised(file, lock, err) {
         delete locks[file];
     }
 
-    lock.options.onCompromised(err);
+    if(lock.options.onCompromised){
+        lock.options.onCompromised(err);
+    }
 }
 
 // ----------------------------------------------------------