diff --git a/forth/bootstrap/bootstrap.fs b/forth/bootstrap/bootstrap.fs
index e9107f3..678cd2e 100644
--- a/forth/bootstrap/bootstrap.fs
+++ b/forth/bootstrap/bootstrap.fs
@@ -404,6 +404,17 @@ variable leaves 0 leaves !
 
 : 2rot >r >r 2swap r> r> 2swap ;
 
+\
+\ 7.3.1.4 - return stack
+\
+
+\ Note: these words are not part of the official OF specification, however
+\ they are part of the ANSI DPANS94 core extensions (see section 6.2) and
+\ so this seems an appropriate place for them.
+: 2>r swap >r >r ;
+: 2r> r> r> swap ;
+: 2r@ r> r> 2dup >r >r swap ;
+
 \ 
 \ 7.3.2.1 - single precision integer arithmetic (part 1)
 \