diff --git a/go/emfminiserv/emfminiserv.go b/go/emfminiserv/emfminiserv.go
index 0e920845bb..110ca1e067 100644
--- a/go/emfminiserv/emfminiserv.go
+++ b/go/emfminiserv/emfminiserv.go
@@ -47,7 +47,7 @@ func validateSignature(content, secret, signature string) bool {
 
 const (
 	talkRegexFragment    = `[0-9]+(_[\p{L}\p{N}\-]+)?`
-	fileEndRegexFragment = `[0-9]{8}-[0-9]{6}[.]mp4`
+	fileEndRegexFragment = `[0-9]{8}-[0-9]{6}(-[a-zA-Z0-9][a-zA-Z0-9\-]*)?[.]mp4`
 )
 
 var (