diff --git a/pmtiles/makesync.go b/pmtiles/makesync.go
index f2ebc2c..80e4c20 100644
--- a/pmtiles/makesync.go
+++ b/pmtiles/makesync.go
@@ -418,8 +418,14 @@ func Sync(logger *log.Logger, file string, syncfilename string, overfetch float3
 
 	ranges := make([]SrcDstRange,0)
 	for _, v := range wanted {
-		ranges = append(ranges,SrcDstRange{SrcOffset:v.Offset,DstOffset:v.Offset,Length:v.Length})
+		l := len(ranges)
+		if l > 0 && (ranges[l-1].SrcOffset + ranges[l-1].Length) == v.Offset {
+			ranges[l-1].Length = ranges[l-1].Length + v.Length
+		} else {
+			ranges = append(ranges,SrcDstRange{SrcOffset:v.Offset,DstOffset:v.Offset,Length:v.Length})
+		}
 	}
+	fmt.Printf("need %d chunks.\n", len(ranges))
 
 	requests, _ := MergeRanges(ranges, overfetch)
 	fmt.Printf("need %d requests with overfetch=%f.\n", requests.Len(), overfetch)