diff --git a/sys/kern/subr_pctrie.c b/sys/kern/subr_pctrie.c
index c5f2c06e6e5..ece2c1d75cf 100644
--- a/sys/kern/subr_pctrie.c
+++ b/sys/kern/subr_pctrie.c
@@ -166,7 +166,7 @@ pctrie_setroot(struct pctrie *ptree, struct pctrie_node *node)
 /*
  * Returns TRUE if the specified node is a leaf and FALSE otherwise.
  */
-static __inline boolean_t
+static __inline bool
 pctrie_isleaf(struct pctrie_node *node)
 {
 
@@ -218,7 +218,7 @@ pctrie_keydiff(uint64_t index1, uint64_t index2)
  * Returns TRUE if it can be determined that key does not belong to the
  * specified node.  Otherwise, returns FALSE.
  */
-static __inline boolean_t
+static __inline bool
 pctrie_keybarr(struct pctrie_node *node, uint64_t idx)
 {
 
@@ -226,7 +226,7 @@ pctrie_keybarr(struct pctrie_node *node, uint64_t idx)
 		idx = pctrie_trimkey(idx, node->pn_clev + 1);
 		return (idx != node->pn_owner);
 	}
-	return (FALSE);
+	return (false);
 }
 
 /*
diff --git a/sys/sys/pctrie.h b/sys/sys/pctrie.h
index 88d5d2583e4..6e9528f24a3 100644
--- a/sys/sys/pctrie.h
+++ b/sys/sys/pctrie.h
@@ -128,7 +128,7 @@ pctrie_init(struct pctrie *ptree)
 	ptree->pt_root = 0;
 }
 
-static __inline boolean_t
+static __inline bool
 pctrie_is_empty(struct pctrie *ptree)
 {