diff --git a/src/main/java/co/stateful/Atomic.java b/src/main/java/co/stateful/Atomic.java
index c66e77e..f48b967 100644
--- a/src/main/java/co/stateful/Atomic.java
+++ b/src/main/java/co/stateful/Atomic.java
@@ -122,6 +122,9 @@ public Atomic(final Callable<T> clbl, final Lock lck, final String lbl,
     public T call() throws Exception {
         final Thread hook = new Thread(
             () -> {
+                if (!this.locked.get()) {
+                    return;
+                }
                 try {
                     this.lock.unlock(this.label);
                 } catch (final IOException ex) {