diff --git a/fs/bpkfs.c b/fs/bpkfs.c
index ae7681afa..8352307e5 100644
--- a/fs/bpkfs.c
+++ b/fs/bpkfs.c
@@ -437,7 +437,7 @@ static int bpkfs_probe(struct device_d *dev)
 
 		dev_dbg(dev, "%d: type = 0x%x => %s\n", i, d->type, d->name);
 		dev_dbg(dev, "%d: size = %llu\n", i, d->size);
-		dev_dbg(dev, "%d: offset = %d\n", i, d->offset);
+		dev_dbg(dev, "%d: offset = %zu\n", i, d->offset);
 
 		dev_dbg(dev, "%d: hw_id = 0x%x => %s\n", i, h->hw_id, h->name);