diff options
| -rw-r--r-- | gnu/services/mail.scm | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gnu/services/mail.scm b/gnu/services/mail.scm index 3029a68663..291a2db8e1 100644 --- a/gnu/services/mail.scm +++ b/gnu/services/mail.scm @@ -99,7 +99,9 @@ (and (string? x) (not (string-index x #\space)))) val))) (define (serialize-space-separated-string-list field-name val) - (serialize-field field-name (string-join val " "))) + (match val + (() #f) + (_ (serialize-field field-name (string-join val " "))))) (define (comma-separated-string-list? val) (and (list? val) |