diff --git a/libc/kernel/uapi/linux/dma-buf.h b/libc/kernel/uapi/linux/dma-buf.h
index 7771906..3d7c099 100644
--- a/libc/kernel/uapi/linux/dma-buf.h
+++ b/libc/kernel/uapi/linux/dma-buf.h
@@ -28,6 +28,8 @@
 #define DMA_BUF_SYNC_START (0 << 2)
 #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
 #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 *)
 #endif