diff --git a/arch/sim/src/sim/up_rptun.c b/arch/sim/src/sim/up_rptun.c
index 66a20939c4..0a0274fb9c 100644
--- a/arch/sim/src/sim/up_rptun.c
+++ b/arch/sim/src/sim/up_rptun.c
@@ -93,7 +93,8 @@ static const char *sim_rptun_get_firmware(struct rptun_dev_s *dev)
   return NULL;
 }
 
-static const struct rptun_addrenv_s *sim_rptun_get_addrenv(struct rptun_dev_s *dev)
+static const struct rptun_addrenv_s *
+  sim_rptun_get_addrenv(struct rptun_dev_s *dev)
 {
   return NULL;
 }