diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 785046e4c3abc22b0dfe973a80b99aa91f7e2a7d..5a7d0a4a9da3f7f8d78c617108a39a550a8e688e 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -22,7 +22,6 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
-#include <linux/swiotlb.h>
 #include <linux/string.h>
 #include <linux/swiotlb.h>
 #include <linux/pfn.h>
@@ -777,8 +776,6 @@ swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
 				  SYNC_FOR_DEVICE);
 }
 
-void swiotlb_unmap_sg_attrs(struct device *, struct scatterlist *, int, int,
-			    struct dma_attrs *);
 /*
  * Map a set of buffers described by scatterlist in streaming mode for DMA.
  * This is the scatter-gather version of the above swiotlb_map_single