diff --git a/samples/syelog/syelogd.cpp b/samples/syelog/syelogd.cpp
index 97174782..4f563a0c 100644
--- a/samples/syelog/syelogd.cpp
+++ b/samples/syelog/syelogd.cpp
@@ -357,7 +357,7 @@ DWORD WINAPI WorkerThread(LPVOID pvVoid)
         b = GetQueuedCompletionStatus(hCompletionPort,
                                       &nBytes, (PULONG_PTR)&pClient, &lpo, INFINITE);
 
-        if (!b || lpo == NULL) {
+        if (!b && lpo == NULL) {
             fKeepLooping = FALSE;
             MyErrExit("GetQueuedCompletionState");
             break;