diff --git a/weed/util/compression.go b/weed/util/compression.go
index 9d52810cb..759be9bb0 100644
--- a/weed/util/compression.go
+++ b/weed/util/compression.go
@@ -126,7 +126,7 @@ func IsZstdContent(data []byte) bool {
 
 	// by file name extension
 	switch ext {
-	case ".zip", ".rar", ".gz", ".bz2", ".xz", ".zst":
+	case ".zip", ".rar", ".gz", ".bz2", ".xz", ".zst", ".br":
 		return false, true
 	case ".pdf", ".txt", ".html", ".htm", ".css", ".js", ".json":
 		return true, true