diff --git a/extra/maze/maze.factor b/extra/maze/maze.factor
index c0623d96b6..4238dab168 100644
--- a/extra/maze/maze.factor
+++ b/extra/maze/maze.factor
@@ -44,7 +44,7 @@ SYMBOL: visited
     line-width 2 - glLineWidth
     line-width 2 - glPointSize
     1.0 1.0 1.0 1.0 glColor4d
-    dup [ drop t <array> ] with map visited set
+    dup iota [ drop t <array> ] with map visited set
     GL_LINE_STRIP glBegin
     { 0 0 } dup vertex (draw-maze)
     glEnd ;