diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index e94575828..52608ac2a 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -1246,7 +1246,7 @@ std::unique_ptr<InterruptCallback> createInterruptCallback(std::function<void()>
     res->it = interruptCallbacks->end();
     res->it--;
 
-    return res;
+    return std::unique_ptr<InterruptCallback>(res.release());
 }
 
 }