diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c
index e790be61a5..ce048cc185 100644
--- a/fs/yaffs2/yaffs_nand.c
+++ b/fs/yaffs2/yaffs_nand.c
@@ -101,7 +101,7 @@ int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
 						 int blockNo,
 						 yaffs_BlockState * state,
-						 unsigned *sequenceNumber)
+						 int *sequenceNumber)
 {
 	blockNo -= dev->blockOffset;
 
diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h
index 48e3f7ec6d..f3bedcf35c 100644
--- a/fs/yaffs2/yaffs_nand.h
+++ b/fs/yaffs2/yaffs_nand.h
@@ -33,7 +33,7 @@ int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo);
 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
 						 int blockNo,
 						 yaffs_BlockState * state,
-						 unsigned *sequenceNumber);
+						 int *sequenceNumber);
 
 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
 				  int blockInNAND);