diff --git a/README.md b/README.md
index a62e6d9..aa2d89e 100644
--- a/README.md
+++ b/README.md
@@ -406,6 +406,30 @@ If _k_ is not a valid index of c-bytevector the behaviour is undefined.
 
 Returns the byte at index _k_ of _c-bytevector_.
 
+(**c-bytevector-char-set!** _c-bytevector_ _k_ _char_)
+
+If _k_ is not a valid index of c-bytevector the behaviour is undefined.
+
+Stores the _char_ in element _k_ of _c-bytevector_.
+
+(**c-bytevector-char-ref** _c-bytevector_ _k_)
+
+If _k_ is not a valid index of c-bytevector the behaviour is undefined.
+
+Returns the char at index _k_ of _c-bytevector_.
+
+(**c-bytevector-uchar-set!** _c-bytevector_ _k_ _char_)
+
+If _k_ is not a valid index of c-bytevector the behaviour is undefined.
+
+Stores the unsigned _char_ in element _k_ of _c-bytevector_.
+
+(**c-bytevector-uchar-ref** _c-bytevector_ _k_)
+
+If _k_ is not a valid index of c-bytevector the behaviour is undefined.
+
+Returns the unsigned char at index _k_ of _c-bytevector_.
+
 (**c-bytevector-uint-ref** _c-bytevector_ _k_ _endianness_ _size_)</br>
 (**c-bytevector-sint-ref** _c-bytevector_ _k_ _endianness_ _size_)</br>
 (**c-bytevector-uint-set!** _c-bytevector_ _k_ _n_ _endianness_ _size_)</br>
diff --git a/documentation/foreign-c.html b/documentation/foreign-c.html
index 8cf73ac..b37ec65 100644
--- a/documentation/foreign-c.html
+++ b/documentation/foreign-c.html
@@ -21,6 +21,8 @@ Schemes - 0.10.0</title>
         tracker</a></p>
         <p><a href="https://sr.ht/~retropikzel/foreign-c/lists">Maling
         lists</a></p>
+        <p><a
+        href="https://jenkins.scheme.org/job/foreign_c/job/foreign-c/">Jenkins</a></p>
         <ul>
         <li><a href="#installation">Installation</a></li>
         <li><a href="#documentation">Documentation</a>
@@ -595,6 +597,30 @@ func(&amp;i);</code></pre>
         behaviour is undefined.</p>
         <p>Returns the byte at index <em>k</em> of
         <em>c-bytevector</em>.</p>
+        <p>(<strong>c-bytevector-char-set!</strong>
+        <em>c-bytevector</em> <em>k</em> <em>char</em>)</p>
+        <p>If <em>k</em> is not a valid index of c-bytevector the
+        behaviour is undefined.</p>
+        <p>Stores the <em>char</em> in element <em>k</em> of
+        <em>c-bytevector</em>.</p>
+        <p>(<strong>c-bytevector-char-ref</strong> <em>c-bytevector</em>
+        <em>k</em>)</p>
+        <p>If <em>k</em> is not a valid index of c-bytevector the
+        behaviour is undefined.</p>
+        <p>Returns the char at index <em>k</em> of
+        <em>c-bytevector</em>.</p>
+        <p>(<strong>c-bytevector-uchar-set!</strong>
+        <em>c-bytevector</em> <em>k</em> <em>char</em>)</p>
+        <p>If <em>k</em> is not a valid index of c-bytevector the
+        behaviour is undefined.</p>
+        <p>Stores the unsigned <em>char</em> in element <em>k</em> of
+        <em>c-bytevector</em>.</p>
+        <p>(<strong>c-bytevector-uchar-ref</strong>
+        <em>c-bytevector</em> <em>k</em>)</p>
+        <p>If <em>k</em> is not a valid index of c-bytevector the
+        behaviour is undefined.</p>
+        <p>Returns the unsigned char at index <em>k</em> of
+        <em>c-bytevector</em>.</p>
         <p>(<strong>c-bytevector-uint-ref</strong> <em>c-bytevector</em>
         <em>k</em> <em>endianness</em> <em>size</em>)</br>
         (<strong>c-bytevector-sint-ref</strong> <em>c-bytevector</em>
diff --git a/documentation/foreign-c.pdf b/documentation/foreign-c.pdf
index 1e613d6..f73fb68 100644
Binary files a/documentation/foreign-c.pdf and b/documentation/foreign-c.pdf differ
diff --git a/foreign/c.sld b/foreign/c.sld
index b0bad81..7fba2be 100644
--- a/foreign/c.sld
+++ b/foreign/c.sld
@@ -205,6 +205,11 @@
           ;; TODO c-bytevector->u8-list
           ;; TODO u8-list->c-bytevector
 
+          c-bytevector-uchar-ref
+          c-bytevector-char-ref
+          c-bytevector-char-set!
+          c-bytevector-uchar-set!
+
           c-bytevector-uint-ref
           c-bytevector-sint-ref
           c-bytevector-sint-set!
diff --git a/foreign/c/c-bytevectors.scm b/foreign/c/c-bytevectors.scm
index c77a46d..1712e9d 100644
--- a/foreign/c/c-bytevectors.scm
+++ b/foreign/c/c-bytevectors.scm
@@ -520,6 +520,18 @@
       (c-bytevector-u8-set! b i (car vals)))
     b))
 
+(define (c-bytevector-uchar-ref c-bytevector index)
+  (integer->char (c-bytevector-u8-ref c-bytevector index)))
+
+(define (c-bytevector-uchar-set! c-bytevector index char)
+  (c-bytevector-u8-set! c-bytevector index (char->integer char)))
+
+(define (c-bytevector-char-ref c-bytevector index)
+  (integer->char (c-bytevector-s8-ref c-bytevector index)))
+
+(define (c-bytevector-char-set! c-bytevector index char)
+  (c-bytevector-s8-set! c-bytevector index (char->integer char)))
+
 (define (c-bytevector-uint-ref c-bytevector index endness size)
   (case endness
    ((big)