1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index f58734c..9b1720b 100644
--- a/io.c
+++ b/io.c
@@ -476,6 +476,7 @@ vbfmt(struct wbuf *out, const char *fmt, va_list ap)
                n += bfmt(buf, "%'S", tok->s, tok->len);
                break;
             case TKIDENT:
+            case TKPPMACARG:
                n += bfmt(buf, "`%s'", tok->s);
                break;
             case TKEOF: