diff --git a/libs/cyclone/concurrent.sld b/libs/cyclone/concurrent.sld
index 19047d38..86a822d6 100644
--- a/libs/cyclone/concurrent.sld
+++ b/libs/cyclone/concurrent.sld
@@ -44,7 +44,7 @@
    thread-pool-idling-count
    thread-pool-idling?
    thread-pool-push-task!
-   ;thread-pool-release!
+   thread-pool-release!
    ;; Immutable objects
    immutable?
    ;; Shared objects