diff --git a/lib/crypto/gpg/gpgbin/gpgbin.go b/lib/crypto/gpg/gpgbin/gpgbin.go
index 3ee8139..bce3097 100644
--- a/lib/crypto/gpg/gpgbin/gpgbin.go
+++ b/lib/crypto/gpg/gpgbin/gpgbin.go
@@ -46,7 +46,7 @@ func parseError(s string) error {
 			return errors.New(line)
 		}
 	}
-	return errors.New("unknown gpg error")
+	return errors.New(strings.Join(lines, ", "))
 }
 
 // fields returns the field name from --status-fd output. See: