diff --git a/libc/kernel/uapi/linux/dma-buf.h b/libc/kernel/uapi/linux/dma-buf.h
index 4e31379..7462c15 100644
--- a/libc/kernel/uapi/linux/dma-buf.h
+++ b/libc/kernel/uapi/linux/dma-buf.h
@@ -29,9 +29,19 @@
 #define DMA_BUF_SYNC_END (1 << 2)
 #define DMA_BUF_SYNC_VALID_FLAGS_MASK (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
 #define DMA_BUF_NAME_LEN 32
+struct dma_buf_export_sync_file {
+  __u32 flags;
+  __s32 fd;
+};
+struct dma_buf_import_sync_file {
+  __u32 flags;
+  __s32 fd;
+};
 #define DMA_BUF_BASE 'b'
 #define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
 #define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 1, const char *)
 #define DMA_BUF_SET_NAME_A _IOW(DMA_BUF_BASE, 1, __u32)
 #define DMA_BUF_SET_NAME_B _IOW(DMA_BUF_BASE, 1, __u64)
+#define DMA_BUF_IOCTL_EXPORT_SYNC_FILE _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file)
+#define DMA_BUF_IOCTL_IMPORT_SYNC_FILE _IOW(DMA_BUF_BASE, 3, struct dma_buf_import_sync_file)
 #endif