diff --git a/lib/chibi/show.sld b/lib/chibi/show.sld
index fb882276..ead2b577 100644
--- a/lib/chibi/show.sld
+++ b/lib/chibi/show.sld
@@ -1,7 +1,7 @@
 
 (define-library (chibi show)
   (export
-   show fn fn-fork with update! each each-in-list call-with-output
+   show fn fn-fork with with! each each-in-list call-with-output
    displayed written written-shared written-simply
    numeric numeric/comma numeric/si numeric/fitted
    nothing nl fl space-to tab-to escaped maybe-escaped
diff --git a/lib/chibi/show/base.scm b/lib/chibi/show/base.scm
index 695d457d..f4489db6 100644
--- a/lib/chibi/show/base.scm
+++ b/lib/chibi/show/base.scm
@@ -14,7 +14,7 @@
   (bind: %fn)
   (bind-fork: fn-fork)
   (local: %with)
-  (local!: update!)
+  (local!: with!)
   (return: return)
   (run: run)
   (fields:
@@ -75,14 +75,14 @@
 
 ;; Run with an output port with initial default values.
 (define (show-run out proc)
-  (run (sequence (update! (port out)
-                          (col 0)
-                          (row 0)
-                          (width 78)
-                          (radix 10)
-                          (pad-char #\space)
-                          (output output-default)
-                          (string-width substring-length))
+  (run (sequence (with! (port out)
+                        (col 0)
+                        (row 0)
+                        (width 78)
+                        (radix 10)
+                        (pad-char #\space)
+                        (output output-default)
+                        (string-width substring-length))
                  proc)))
 
 ;;> Temporarily bind the parameters in the body \var{x}.
@@ -94,7 +94,7 @@
 
 ;;> The noop formatter.  Generates no output and leaves the state
 ;;> unmodified.
-(define nothing (fn () (update!)))
+(define nothing (fn () (with!)))
 
 ;;> Formats a displayed version of x - if a string or char, outputs the
 ;;> raw characters (as with `display'), if x is already a formatter
@@ -131,9 +131,9 @@
     (display str port)
     (let ((nl-index (string-find-right str #\newline)))
       (if (string-cursor>? nl-index (string-cursor-start str))
-          (update! (row (+ row (string-count str #\newline)))
-                   (col (string-width str (string-cursor->index str nl-index))))
-          (update! (col (+ col (string-width str))))))))
+          (with! (row (+ row (string-count str #\newline)))
+                 (col (string-width str (string-cursor->index str nl-index))))
+          (with! (col (+ col (string-width str))))))))
 
 ;;> Captures the output of \var{producer} and formats the result with
 ;;> \var{consumer}.
diff --git a/lib/chibi/show/base.sld b/lib/chibi/show/base.sld
index 6cf08564..8b2f8a46 100644
--- a/lib/chibi/show/base.sld
+++ b/lib/chibi/show/base.sld
@@ -1,7 +1,7 @@
 
 (define-library (chibi show base)
   (export
-   show fn fn-fork with update! each each-in-list call-with-output
+   show fn fn-fork with with! each each-in-list call-with-output
    displayed written written-shared written-simply numeric nothing
    escaped maybe-escaped numeric/si numeric/fitted numeric/comma
    ;; internal
diff --git a/lib/chibi/show/column.scm b/lib/chibi/show/column.scm
index d49af877..826a21c0 100644
--- a/lib/chibi/show/column.scm
+++ b/lib/chibi/show/column.scm
@@ -30,10 +30,10 @@
            (let ((nl-index
                   (string-index-right str (lambda (ch) (eqv? ch #\newline)))))
              (if (string-cursor>? nl-index (string-cursor-start str))
-                 (update!
+                 (with!
                   (row (+ row (string-count str (lambda (ch) (eqv? ch #\newline)))))
                   (col (string-width str (string-cursor->index str nl-index))))
-                 (update! (col (+ col (string-width str))))))
+                 (with! (col (+ col (string-width str))))))
            (call-with-current-continuation
             (lambda (cc)
               (set! resume cc)
diff --git a/lib/chibi/show/show.scm b/lib/chibi/show/show.scm
index f373405a..602736bf 100644
--- a/lib/chibi/show/show.scm
+++ b/lib/chibi/show/show.scm
@@ -223,7 +223,7 @@
                  (let* ((end (max 0 (- len (- chars-written width))))
                         (s (substring str 0 end)))
                    (each (output s)
-                         (update! (output orig-output))
+                         (with! (output orig-output))
                          (fn () (return nothing))))
                  (output str))))
          (with ((output output*))
diff --git a/lib/srfi/159.sld b/lib/srfi/159.sld
index 6c180b9b..ca254724 100644
--- a/lib/srfi/159.sld
+++ b/lib/srfi/159.sld
@@ -4,7 +4,7 @@
           (srfi 159 unicode) (srfi 159 color))
   (export
    ;; base
-   show fn fn-fork with update! each each-in-list call-with-output
+   show fn fn-fork with with! each each-in-list call-with-output
    displayed written written-shared written-simply
    numeric numeric/comma numeric/si numeric/fitted
    nothing nl fl space-to tab-to escaped maybe-escaped
diff --git a/tests/lib-tests.scm b/tests/lib-tests.scm
index e05fa4b4..b0e285fc 100644
--- a/tests/lib-tests.scm
+++ b/tests/lib-tests.scm
@@ -49,6 +49,7 @@
         (rename (chibi regexp-test) (run-tests run-regexp-tests))
         (rename (chibi scribble-test) (run-tests run-scribble-tests))
         (rename (chibi show-test) (run-tests run-show-tests))
+        (rename (chibi show c-test) (run-tests run-show-c-tests))
         (rename (chibi string-test) (run-tests run-string-tests))
         (rename (chibi system-test) (run-tests run-system-tests))
         (rename (chibi tar-test) (run-tests run-tar-tests))
@@ -106,6 +107,7 @@
 (run-string-tests)
 (run-sha2-tests)
 (run-show-tests)
+(run-show-c-tests)
 (run-system-tests)
 (run-tar-tests)
 (run-uri-tests)