diff --git a/extra/math/hashcodes/hashcodes.factor b/extra/math/hashcodes/hashcodes.factor
index f0d7197e68..9fd454e51e 100644
--- a/extra/math/hashcodes/hashcodes.factor
+++ b/extra/math/hashcodes/hashcodes.factor
@@ -18,7 +18,7 @@ GENERIC: number-hashcode ( x -- h )
 
 : hash-fraction ( m n -- h )
 
-    [ 2dup [ P mod zero? ] bi@ and ] [
+    [ 2dup [ P mod zero? ] both? ] [
         [ P /i ] bi@
     ] while
 
diff --git a/extra/python/syntax/syntax-tests.factor b/extra/python/syntax/syntax-tests.factor
index ca0551cabb..1c5c8cd246 100644
--- a/extra/python/syntax/syntax-tests.factor
+++ b/extra/python/syntax/syntax-tests.factor
@@ -66,7 +66,7 @@ IN: python.syntax.tests
 [ t ] [
     "python-file" temp-file >py "wb" >py open
     [ tell ] [ fileno ] [ close ] tri
-    [ py> integer? ] bi@ and
+    [ py> integer? ] both?
 ] py-test
 
 ! Method chaining