diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 35ea00c..7243bfc 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -395,7 +395,7 @@
 
 const char *os_dirent_get_typename(enum os_dirent_t type)
 {
-	if (type >= 0 && type < OS_FILET_COUNT)
+	if (type >= OS_FILET_REG && type < OS_FILET_COUNT)
 		return os_dirent_typename[type];
 
 	return os_dirent_typename[OS_FILET_UNKNOWN];