diff --git a/include/sys/zio_compress.h b/include/sys/zio_compress.h
index 1642823d3d..208117eee4 100644
--- a/include/sys/zio_compress.h
+++ b/include/sys/zio_compress.h
@@ -105,8 +105,7 @@ extern size_t lz4_compress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
     int level);
 extern int lz4_decompress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
     int level);
-extern int lz4_decompress_abd(abd_t *src, void *dst, size_t s_len, size_t d_len,
-    int level);
+
 /*
  * Compress and decompress data if necessary.
  */