diff --git a/basis/math/vectors/vectors.factor b/basis/math/vectors/vectors.factor
index 2426e4814b..ee417de12b 100644
--- a/basis/math/vectors/vectors.factor
+++ b/basis/math/vectors/vectors.factor
@@ -163,7 +163,7 @@ PRIVATE>
 
 : trilerp ( aaa baa aba bba aab bab abb bbb {t,u,v} -- a_tuv )
     [ first lerp ] [ second lerp ] [ third lerp ] tri-curry
-    [ 2tetra@ ] [ 2bi@ ] [ call ] tri* ;
+    [ 2tetra@ ] [ 2bi@ ] [ call ] tri* ; inline
 
 : bilerp ( aa ba ab bb {t,u} -- a_tu )
     [ first lerp ] [ second lerp ] bi-curry