diff --git a/lib/dns/adb.c b/lib/dns/adb.c
index b0ffa56415..f304d1d50a 100644
--- a/lib/dns/adb.c
+++ b/lib/dns/adb.c
@@ -477,7 +477,15 @@ import_rdataset(dns_adbname_t *adbname, dns_rdataset_t *rdataset,
 
 		if (IN6_IS_ADDR_V4MAPPED(&sockaddr.type.sin6.sin6_addr)
 		    || IN6_IS_ADDR_V4COMPAT(&sockaddr.type.sin6.sin6_addr)) {
-			DP(1, "Ignoring IPv6 mapped IPv4 address");
+			isc_buffer_t buffer;
+			char buff[80];
+
+			isc_buffer_init(&buffer, buff, sizeof buff);
+			isc_sockaddr_totext(&sockaddr, &buffer);
+
+			DP(1, "Ignoring IPv6 mapped IPv4 address: %*s",
+			   isc_buffer_usedlength(&buffer),
+			   isc_buffer_base(&buffer));
 			goto next;
 		}
 
@@ -583,7 +591,15 @@ import_a6(dns_a6context_t *a6ctx) {
 
 	if (IN6_IS_ADDR_V4MAPPED(&sockaddr.type.sin6.sin6_addr)
 	    || IN6_IS_ADDR_V4COMPAT(&sockaddr.type.sin6.sin6_addr)) {
-		DP(1, "Ignoring IPv6 mapped IPv4 address");
+		isc_buffer_t buffer;
+		char buff[80];
+
+		isc_buffer_init(&buffer, buff, sizeof buff);
+		isc_sockaddr_totext(&sockaddr, &buffer);
+
+		DP(1, "Ignoring IPv6 mapped IPv4 address: %*s",
+		   isc_buffer_usedlength(&buffer),
+		   isc_buffer_base(&buffer));
 		goto fail;
 	}