diff --git a/include/linux/sbitmap.h b/include/linux/sbitmap.h
index e6539536dea97718bede84d163f6fbf9a6578f31..804a50983ec5996cb2a98ed36cac51534810aa41 100644
--- a/include/linux/sbitmap.h
+++ b/include/linux/sbitmap.h
@@ -23,6 +23,8 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 
+struct seq_file;
+
 /**
  * struct sbitmap_word - Word in a &struct sbitmap.
  */