diff --git a/src/winio.c b/src/winio.c
index 0e21d2d..c617fc8 100644
--- a/src/winio.c
+++ b/src/winio.c
@@ -2949,7 +2949,8 @@
 
     maxrows = 0;
     for (n = 0; n < editwinrows && foo; n++) {
-	maxrows += 1 - strlenpt(foo->data) / COLS;
+	maxrows ++;
+	n += strlenpt(foo->data) / COLS;
 	foo = foo->next;
     }