diff --git a/libs/libc/include/sys/stat.h b/libs/libc/include/sys/stat.h
index b92d6d54..1edd919c 100644
--- a/libs/libc/include/sys/stat.h
+++ b/libs/libc/include/sys/stat.h
@@ -14,6 +14,7 @@ struct stat // FIXME: This struct is quite stubbed out.
 
 #define S_ISDIR(mode) (((mode)&0xf) == __VFS_DIRECTORY)
 #define S_ISREG(mode) (((mode)&0xf) == __VFS_FILE)
+#define S_ISDEV(mode) (((mode)&0xf) == __VFS_DEVICE)
 
 #ifdef __cplusplus
 extern "C"