diff --git a/boards/sim/sim/sim/configs/rpproxy_virtio/defconfig b/boards/sim/sim/sim/configs/rpproxy_virtio/defconfig
index f0bfad2d0f8..4530dc4c265 100644
--- a/boards/sim/sim/sim/configs/rpproxy_virtio/defconfig
+++ b/boards/sim/sim/sim/configs/rpproxy_virtio/defconfig
@@ -68,7 +68,6 @@ CONFIG_SCHED_WAITPID=y
 CONFIG_SENSORS=y
 CONFIG_SENSORS_RPMSG=y
 CONFIG_SIG_DEFAULT=y
-CONFIG_SIM_M32=y
 CONFIG_SYSLOG_PREFIX=y
 CONFIG_SYSLOG_PREFIX_STRING="proxy"
 CONFIG_SYSLOG_RPMSG=y
diff --git a/boards/sim/sim/sim/configs/rpserver_virtio/defconfig b/boards/sim/sim/sim/configs/rpserver_virtio/defconfig
index 58c859085e2..3a2686b63d4 100644
--- a/boards/sim/sim/sim/configs/rpserver_virtio/defconfig
+++ b/boards/sim/sim/sim/configs/rpserver_virtio/defconfig
@@ -86,7 +86,6 @@ CONFIG_SENSORS=y
 CONFIG_SENSORS_RPMSG=y
 CONFIG_SIG_DEFAULT=y
 CONFIG_SIM_HOSTFS=y
-CONFIG_SIM_M32=y
 CONFIG_SIM_NETDEV=y
 CONFIG_SIM_NET_BRIDGE=y
 CONFIG_SIM_RPMSG_MASTER=y
diff --git a/drivers/ioexpander/ioe_rpmsg.c b/drivers/ioexpander/ioe_rpmsg.c
index 9fe562798a6..ed68bd34c78 100644
--- a/drivers/ioexpander/ioe_rpmsg.c
+++ b/drivers/ioexpander/ioe_rpmsg.c
@@ -365,7 +365,7 @@ static void *ioe_rpmsg_attach(FAR struct ioexpander_dev_s *dev,
                            (struct ioe_rpmsg_header_s *)&msg, sizeof(msg));
   if (ret >= 0)
     {
-      return (FAR void *)(ret + 1);
+      return (FAR void *)((uintptr_t)(ret + 1));
     }
 
   return NULL;