diff --git a/bin/named/dlz_dlopen_driver.c b/bin/named/dlz_dlopen_driver.c
index 47f879ae49..f90e1946a3 100644
--- a/bin/named/dlz_dlopen_driver.c
+++ b/bin/named/dlz_dlopen_driver.c
@@ -224,6 +224,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 	}
 
 	isc_mem_create(&mctx);
+	isc_mem_setname(mctx, "dlz");
 	cd = isc_mem_get(mctx, sizeof(*cd));
 	memset(cd, 0, sizeof(*cd));
 
diff --git a/bin/named/main.c b/bin/named/main.c
index 03d4dec5d7..df47e8d667 100644
--- a/bin/named/main.c
+++ b/bin/named/main.c
@@ -645,6 +645,7 @@ printversion(bool verbose) {
 	printf("threads support is enabled\n");
 
 	isc_mem_create(&mctx);
+	isc_mem_setname(mctx, "main");
 	result = dst_lib_init(mctx, named_g_engine);
 	if (result == ISC_R_SUCCESS) {
 		isc_buffer_init(&b, buf, sizeof(buf));