diff --git a/examples/sotest/sotest_main.c b/examples/sotest/sotest_main.c
index 5c1568e59..2f63ef60b 100644
--- a/examples/sotest/sotest_main.c
+++ b/examples/sotest/sotest_main.c
@@ -102,7 +102,9 @@ extern const int g_sot_nexports;
 
 int main(int argc, FAR char *argv[])
 {
+#ifdef CONFIG_EXAMPLES_SOTEST_BUILTINFS
   char devname[32];
+#endif
 #if CONFIG_MODLIB_MAXDEPEND > 0
   FAR void *handle1;
 #endif