diff --git a/chapter25.tex b/chapter25.tex
index d7db53d..99c7ca7 100644
--- a/chapter25.tex
+++ b/chapter25.tex
@@ -454,7 +454,7 @@ a number of sticks in a nim heap.
 If the Grundy number is 0, we can only move to
 states whose Grundy numbers are positive,
 and if the Grundy number is $x>0$, we can move
-to states whose Grundy numbers incluce all numbers
+to states whose Grundy numbers include all numbers
 $0,1,\ldots,x-1$.
 
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