diff --git a/src/textrank.a b/src/textrank.a
index 022f2f3dc..866d7a2c0 100644
--- a/src/textrank.a
+++ b/src/textrank.a
@@ -86,6 +86,8 @@ TextRankCallback
          +ST16 zpword
          ldy   #0
          lda   (zpstring),y
+         sec
+         sbc   #1
          cmp   InputLength
          bcc   ++
          sta   gamelength