diff --git a/src/manager/DnsCache.h b/src/manager/DnsCache.h
index 3b54c2d6..04784e22 100644
--- a/src/manager/DnsCache.h
+++ b/src/manager/DnsCache.h
@@ -159,7 +159,7 @@ private:
 		{
 			struct addrinfo *ai = value.addrinfo;
 
-			if (ai && (ai->ai_flags | AI_PASSIVE))
+			if (ai && (ai->ai_flags & AI_PASSIVE))
 				freeaddrinfo(ai);
 			else
 				DnsUtil::freeaddrinfo(ai);