diff --git a/src/machine.h b/src/machine.h
index 96ac9c5086..0841eb4443 100644
--- a/src/machine.h
+++ b/src/machine.h
@@ -2041,7 +2041,6 @@ startThread(Thread* t, object javaThread)
     ACQUIRE_RAW(t, t->m->stateLock);
     
     if (t->m->threadCount > t->m->liveCount + ZombieCollectionThreshold) {
-      fprintf(stderr, "hit zombie collection threshold\n");
       collect(t, Heap::MinorCollection);
     }
   }