diff --git a/doc/go1.19.html b/doc/go1.19.html
index 164f967bdd..0bf5472246 100644
--- a/doc/go1.19.html
+++ b/doc/go1.19.html
@@ -166,6 +166,16 @@ Do not send CLs removing the interior tags from such phrases.
   </dd>
 </dl> <!-- os/exec -->
 
+<dl id="reflect"><dt><a href="/pkg/reflect/">reflect</a></dt>
+  <dd>
+    <p><!-- CL 401434 -->
+      <a href="/pkg/strconv/#reflect.SliceHeader"></a><code>reflect.SliceHeader</code>
+      and <a href="/pkg/strconv/#reflect.StringHeader"></a><code>reflect.StringHeader</code>
+      are now deprecated, and their use should be avoided.
+    </p>
+  </dd>
+</dl><!-- reflect -->
+
 <dl id="runtime"><dt><a href="/pkg/runtime/">runtime</a></dt>
   <dd>
     <p><!-- https://go.dev/issue/51461 -->
diff --git a/src/reflect/value.go b/src/reflect/value.go
index d68f7ad2e6..0fc19ef101 100644
--- a/src/reflect/value.go
+++ b/src/reflect/value.go
@@ -2660,6 +2660,9 @@ func (v Value) UnsafePointer() unsafe.Pointer {
 // Moreover, the Data field is not sufficient to guarantee the data
 // it references will not be garbage collected, so programs must keep
 // a separate, correctly typed pointer to the underlying data.
+//
+// Deprecated: this type should not be used, it exists only for
+// backward compatibility.
 type StringHeader struct {
 	Data uintptr
 	Len  int
@@ -2671,6 +2674,9 @@ type StringHeader struct {
 // Moreover, the Data field is not sufficient to guarantee the data
 // it references will not be garbage collected, so programs must keep
 // a separate, correctly typed pointer to the underlying data.
+//
+// Deprecated: this type should not be used, it exists only for
+// backward compatibility.
 type SliceHeader struct {
 	Data uintptr
 	Len  int