diff --git a/include/uapi/linux/dma-buf.h b/include/uapi/linux/dma-buf.h
index 514beecd2d1364aefe29b9db0477f968df041827..f0eef45dd19fc04642ee4e43bb757c8fb3c6b6b4 100644
--- a/include/uapi/linux/dma-buf.h
+++ b/include/uapi/linux/dma-buf.h
@@ -28,7 +28,7 @@ struct dma_buf_sync {
 };
 
 struct dma_buf_phys {
-	unsigned long phys;
+	__u64 phys;
 };
 
 #define DMA_BUF_SYNC_READ      (1 << 0)