diff --git a/lib/dns/iptable.c b/lib/dns/iptable.c
index f479d71d84..36209bf36f 100644
--- a/lib/dns/iptable.c
+++ b/lib/dns/iptable.c
@@ -28,7 +28,6 @@ destroy_iptable(dns_iptable_t *dtab);
  */
 isc_result_t
 dns_iptable_create(isc_mem_t *mctx, dns_iptable_t **target) {
-	isc_result_t result;
 	dns_iptable_t *tab;
 
 	tab = isc_mem_get(mctx, sizeof(*tab));
@@ -38,17 +37,10 @@ dns_iptable_create(isc_mem_t *mctx, dns_iptable_t **target) {
 	tab->radix = NULL;
 	tab->magic = DNS_IPTABLE_MAGIC;
 
-	result = isc_radix_create(mctx, &tab->radix, RADIX_MAXBITS);
-	if (result != ISC_R_SUCCESS) {
-		goto cleanup;
-	}
+	isc_radix_create(mctx, &tab->radix, RADIX_MAXBITS);
 
 	*target = tab;
 	return (ISC_R_SUCCESS);
-
-cleanup:
-	dns_iptable_detach(&tab);
-	return (result);
 }
 
 static bool dns_iptable_neg = false;
diff --git a/lib/isc/include/isc/radix.h b/lib/isc/include/isc/radix.h
index 9a91118090..3bb01fbd80 100644
--- a/lib/isc/include/isc/radix.h
+++ b/lib/isc/include/isc/radix.h
@@ -100,8 +100,8 @@ typedef struct isc_radix_node {
 						      * nodes */
 } isc_radix_node_t;
 
-#define RADIX_TREE_MAGIC    ISC_MAGIC('R', 'd', 'x', 'T');
-#define RADIX_TREE_VALID(a) ISC_MAGIC_VALID(a, RADIX_TREE_MAGIC);
+#define RADIX_TREE_MAGIC    ISC_MAGIC('R', 'd', 'x', 'T')
+#define RADIX_TREE_VALID(a) ISC_MAGIC_VALID(a, RADIX_TREE_MAGIC)
 
 typedef struct isc_radix_tree {
 	unsigned int	  magic;
@@ -157,7 +157,7 @@ isc_radix_remove(isc_radix_tree_t *radix, isc_radix_node_t *node);
  * \li	'node' to be valid.
  */
 
-isc_result_t
+void
 isc_radix_create(isc_mem_t *mctx, isc_radix_tree_t **target, int maxbits);
 /*%<
  * Create a radix tree with a maximum depth of 'maxbits';
diff --git a/lib/isc/radix.c b/lib/isc/radix.c
index 54c03832f1..f688a75255 100644
--- a/lib/isc/radix.c
+++ b/lib/isc/radix.c
@@ -131,24 +131,18 @@ _comp_with_mask(void *addr, void *dest, u_int mask) {
 	return (0);
 }
 
-isc_result_t
+void
 isc_radix_create(isc_mem_t *mctx, isc_radix_tree_t **target, int maxbits) {
-	isc_radix_tree_t *radix;
-
 	REQUIRE(target != NULL && *target == NULL);
+	RUNTIME_CHECK(maxbits <= RADIX_MAXBITS);
 
-	radix = isc_mem_get(mctx, sizeof(isc_radix_tree_t));
-
-	radix->mctx = NULL;
+	isc_radix_tree_t *radix = isc_mem_get(mctx, sizeof(isc_radix_tree_t));
+	*radix = (isc_radix_tree_t){
+		.maxbits = maxbits,
+		.magic = RADIX_TREE_MAGIC,
+	};
 	isc_mem_attach(mctx, &radix->mctx);
-	radix->maxbits = maxbits;
-	radix->head = NULL;
-	radix->num_active_node = 0;
-	radix->num_added_node = 0;
-	RUNTIME_CHECK(maxbits <= RADIX_MAXBITS); /* XXX */
-	radix->magic = RADIX_TREE_MAGIC;
 	*target = radix;
-	return (ISC_R_SUCCESS);
 }
 
 /*
diff --git a/tests/isc/radix_test.c b/tests/isc/radix_test.c
index fe589fe2b7..def5e9cf58 100644
--- a/tests/isc/radix_test.c
+++ b/tests/isc/radix_test.c
@@ -41,8 +41,7 @@ ISC_RUN_TEST_IMPL(isc_radix_remove) {
 
 	UNUSED(state);
 
-	result = isc_radix_create(mctx, &radix, 32);
-	assert_int_equal(result, ISC_R_SUCCESS);
+	isc_radix_create(mctx, &radix, 32);
 
 	in_addr.s_addr = inet_addr("1.1.1.1");
 	isc_netaddr_fromin(&netaddr, &in_addr);
@@ -90,8 +89,7 @@ ISC_RUN_TEST_IMPL(isc_radix_search) {
 
 	UNUSED(state);
 
-	result = isc_radix_create(mctx, &radix, 32);
-	assert_int_equal(result, ISC_R_SUCCESS);
+	isc_radix_create(mctx, &radix, 32);
 
 	in_addr.s_addr = inet_addr("3.3.3.0");
 	isc_netaddr_fromin(&netaddr, &in_addr);