Index: b/common/dns-cert.c
===================================================================
--- b/common/dns-cert.c
+++ b/common/dns-cert.c
@@ -268,7 +268,6 @@
 
           class = buf16_to_u16 (pt);
           pt += 2;
-          class |= *pt++;
 
           if (class != C_IN)
             break;