diff --git a/src/nodeClass.js b/src/nodeClass.js
index d92c73f..53c0de7 100644
--- a/src/nodeClass.js
+++ b/src/nodeClass.js
@@ -264,7 +264,7 @@ try{
       } catch (error) {
         this.node.error(`Error handling input (${msg?.topic}): ${error?.message || error}`);
       } finally {
-        done();
+        if (typeof done === 'function') done();
       }
     });
   }
@@ -276,7 +276,7 @@ try{
     this.node.on('close', (done) => {
       clearInterval(this._tickInterval);
       clearInterval(this._statusInterval);
-      done();
+      if (typeof done === 'function') done();
     });
   }
 }