diff --git a/libs/libc/netdb/lib_dnsquery.c b/libs/libc/netdb/lib_dnsquery.c
index 45c984396c..7b749f7b9f 100644
--- a/libs/libc/netdb/lib_dnsquery.c
+++ b/libs/libc/netdb/lib_dnsquery.c
@@ -334,6 +334,7 @@ static int dns_recv_response(int sd, FAR union dns_addr_u *addr, int naddr,
   FAR struct dns_answer_s *ans;
   FAR struct dns_header_s *hdr;
   FAR struct dns_question_s *que;
+  struct dns_question_s bak;
   uint16_t nquestions;
   uint16_t nanswers;
   uint16_t temp;
@@ -437,12 +438,13 @@ static int dns_recv_response(int sd, FAR union dns_addr_u *addr, int naddr,
   /* Validate query type and class */
 
   que = (FAR struct dns_question_s *)nameptr;
+  memcpy(&bak, que, sizeof(struct dns_question_s));
 
   /* N.B. Unaligned access may occur here */
 
   temp = HTONS(DNS_CLASS_IN);
-  if (memcmp(&que->type, &qinfo->rectype, sizeof(uint16_t)) != 0 ||
-      memcmp(&que->class, &temp, sizeof(uint16_t)) != 0)
+  if (memcmp(&bak.type, &qinfo->rectype, sizeof(uint16_t)) != 0 ||
+      memcmp(&bak.class, &temp, sizeof(uint16_t)) != 0)
     {
       nerr("ERROR: DNS response with wrong question\n");
       return -EBADMSG;