diff --git a/extra/math/function-tools/function-tools.factor b/extra/math/function-tools/function-tools.factor
index 802bf9e14e..ec93a0891a 100644
--- a/extra/math/function-tools/function-tools.factor
+++ b/extra/math/function-tools/function-tools.factor
@@ -3,7 +3,7 @@
 
 USING: kernel math arrays sequences sequences.lib ;
 IN: math.function-tools 
-: difference-func ( func func -- func ) [ bi - ] 2curry ;
-: eval ( x func -- pt ) dupd call 2array ;
-: eval-inverse ( y func -- pt ) dupd call swap 2array ;
-: eval3d ( x y func -- pt ) [ 2dup ] dip call 3array ;
+: difference-func ( func func -- func ) [ bi - ] 2curry ; inline
+: eval ( x func -- pt ) dupd call 2array ; inline
+: eval-inverse ( y func -- pt ) dupd call swap 2array ; inline
+: eval3d ( x y func -- pt ) [ 2dup ] dip call 3array ; inline