diff --git a/examples/guessinggame.pil b/examples/guessinggame.pil
index d7de2b3..a5e97ab 100644
--- a/examples/guessinggame.pil
+++ b/examples/guessinggame.pil
@@ -27,5 +27,5 @@ marker set,mainloop
 print "You guessed it! It's ",$~number,!
 print "Now guess another number..."
 
-inc number,7
+inc asint,number,7
 marker goto,mainloop