diff --git a/nl/nl_linux.go b/nl/nl_linux.go
index ff9e5cf3..e318e099 100644
--- a/nl/nl_linux.go
+++ b/nl/nl_linux.go
@@ -574,7 +574,7 @@ done:
 				err = syscall.Errno(-errno)
 
 				unreadData := m.Data[4:]
-				if m.Header.Flags|unix.NLM_F_ACK_TLVS != 0 && len(unreadData) > syscall.SizeofNlMsghdr {
+				if m.Header.Flags&unix.NLM_F_ACK_TLVS != 0 && len(unreadData) > syscall.SizeofNlMsghdr {
 					// Skip the echoed request message.
 					echoReqH := (*syscall.NlMsghdr)(unsafe.Pointer(&unreadData[0]))
 					unreadData = unreadData[nlmAlignOf(int(echoReqH.Len)):]