diff --git a/libc/kernel/uapi/linux/magic.h b/libc/kernel/uapi/linux/magic.h
index f3b337e..38b5c85 100644
--- a/libc/kernel/uapi/linux/magic.h
+++ b/libc/kernel/uapi/linux/magic.h
@@ -94,4 +94,6 @@
 #define UDF_SUPER_MAGIC 0x15013346
 #define BALLOON_KVM_MAGIC 0x13661366
 #define ZSMALLOC_MAGIC 0x58295829
+#define DMA_BUF_MAGIC 0x444d4142
+#define Z3FOLD_MAGIC 0x33
 #endif