diff --git a/src/misc2.c b/src/misc2.c
index 271014f..2436f9f 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -161,7 +161,8 @@
 	if (finetune
 		&& curwin->w_p_wrap
 		&& curwin->w_width != 0
-		&& wcol >= (colnr_T)width)
+		&& wcol >= (colnr_T)width
+		&& width > 0)
 	{
 	    csize = linetabsize(line);
 	    if (csize > 0)