diff --git a/docs/strbuf.txt b/docs/strbuf.txt
index 29f035c..48aae8d 100644
--- a/docs/strbuf.txt
+++ b/docs/strbuf.txt
@@ -37,6 +37,10 @@ Functions
 
     Adds one character 'ch' to the end of ->buf
 
+`strbuf_append_repeat()`::
+
+    Adds 'len' characters of 'ch' to the end of ->buf
+
 `strbuf_reduce()`::
 
 Will reduce ->buf by 'len' bytes from the end.