diff --git a/examples/sotest/Kconfig b/examples/sotest/Kconfig
index beea7710c1b..eae61b5a668 100644
--- a/examples/sotest/Kconfig
+++ b/examples/sotest/Kconfig
@@ -15,7 +15,7 @@ if EXAMPLES_SOTEST
 config EXAMPLES_SOTEST_BUILTINFS
 	bool "Built-in File System"
 	default y
-	depends on FS_ROMFS && BUILD_FLAT
+	depends on FS_ROMFS && BUILD_FLAT && BOARDCTL_ROMDISK
 	---help---
 		This example supports a very, non-standard but also very convenient
 		way of testing with example using CONFIG_EXAMPLES_SOTEST_BUILTINFS.
diff --git a/examples/sotest/sotest_main.c b/examples/sotest/sotest_main.c
index 5c1568e5934..2f63ef60b81 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