diff --git a/pmtiles/extract.go b/pmtiles/extract.go
index 0c14bd4..254b8a2 100644
--- a/pmtiles/extract.go
+++ b/pmtiles/extract.go
@@ -441,6 +441,7 @@ func Extract(_ *log.Logger, bucketURL string, key string, minzoom int8, maxzoom
 	header.TileContentsCount = tileContents
 
 	header.MaxZoom = uint8(maxzoom)
+	header.MinZoom = uint8(minzoom)
 
 	headerBytes := serializeHeader(header)