diff --git a/vacuum_gambit.p8 b/vacuum_gambit.p8
index 2c7c667..43970c7 100644
--- a/vacuum_gambit.p8
+++ b/vacuum_gambit.p8
@@ -192,7 +192,7 @@ end
 function ones(n)
  local ret = 0
  while n != 0 do
-  ret += 
+  ret += 1
  end
 end