diff --git a/extra/math/extras/extras.factor b/extra/math/extras/extras.factor
index 4568ac4227..7e99b35364 100644
--- a/extra/math/extras/extras.factor
+++ b/extra/math/extras/extras.factor
@@ -11,10 +11,10 @@ sequences.private sets sorting sorting.extras ;
 
 IN: math.extras
 
-<PRIVATE
-
 DEFER: stirling
 
+<PRIVATE
+
 : (stirling) ( n k -- x )
     [ [ 1 - ] bi@ stirling ]
     [ [ 1 - ] dip stirling ]