diff --git a/src/util/sysinfo.c b/src/util/sysinfo.c
index 220338f..e6d687e 100644
--- a/src/util/sysinfo.c
+++ b/src/util/sysinfo.c
@@ -620,7 +620,7 @@ virSysinfoParseCPUInfoProcessor(const char *base, virSysinfoDefPtr ret)
         if(!physical_id) {
             physical_id = tmp_physical_id;
         }
-        else if (!strncmp(physical_id, tmp_physical_id, physical_id_len)) {
+        else if (STREQLEN(physical_id, tmp_physical_id, physical_id_len)) {
             base = cur;
             continue;
         }