diff --git a/drivers/syslog/syslog_channel.c b/drivers/syslog/syslog_channel.c
index c05c4ba1df..bff3d8d1cc 100644
--- a/drivers/syslog/syslog_channel.c
+++ b/drivers/syslog/syslog_channel.c
@@ -27,6 +27,7 @@
 #include <sys/types.h>
 #include <assert.h>
 #include <errno.h>
+#include <semaphore.h>
 
 #include <nuttx/syslog/syslog.h>
 #include <nuttx/compiler.h>
@@ -95,7 +96,9 @@ static struct syslog_channel_s g_rpmsg_channel =
 #endif
 
 #if defined(CONFIG_SYSLOG_DEFAULT)
+#  if defined(CONFIG_ARCH_LOWPUTC)
 static sem_t g_syslog_default_sem = SEM_INITIALIZER(1);
+#  endif
 
 static const struct syslog_channel_ops_s g_default_channel_ops =
 {