diff --git a/doc/README.developer b/doc/README.developer
index 91ff90218e..7ba5028600 100644
--- a/doc/README.developer
+++ b/doc/README.developer
@@ -459,9 +459,9 @@ I.e. do not use a buffer declared as
 instead allocate a buffer dynamically using the string-specific or plain wmem
 routines (see README.wmem) such as
 
-   emem_strbuf_t *strbuf;
-   strbuf = ep_strbuf_new_label("");
-   ep_strbuf_append_printf(strbuf, ...
+   wmem_strbuf_t *strbuf;
+   strbuf = wmem_strbuf_new(wmem_packet_scope(), "");
+   wmem_strbuf_append_printf(strbuf, ...
 
 or
 
diff --git a/doc/README.wmem b/doc/README.wmem
index 63782085e9..23f841f267 100644
--- a/doc/README.wmem
+++ b/doc/README.wmem
@@ -114,6 +114,7 @@ to the lifetime of the pinfo struct.
  - wmem_strbuf_new
  - wmem_strbuf_sized_new
  - wmem_strbuf_append
+ - wmem_strbuf_append_printf
  - wmem_strbuf_get_str
  - wmem_strbuf_get_len