diff --git a/col.c b/col.c
index c06f73b..e30161f 100644
--- a/col.c
+++ b/col.c
@@ -346,7 +346,7 @@ flush_blanks(void)
 		PUTC('\n');
 	if (half) {
 		PUTC('\033');
-		PUTC('9');
+		PUTC('\011');
 		if (!nb)
 			PUTC('\r');
 	}