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-rw-r--r--lib/format/format.go4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/format/format.go b/lib/format/format.go
index 0cb9693..b66a180 100644
--- a/lib/format/format.go
+++ b/lib/format/format.go
@@ -138,6 +138,10 @@ func ParseMessageFormat(
 			retval = append(retval, 's')
 			args = append(args, val)
 
+		case 'g':
+			retval = append(retval, 's')
+			args = append(args, strings.Join(msg.Labels, ", "))
+
 		case 'i':
 			retval = append(retval, 's')
 			args = append(args, msg.Envelope.MessageId)