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-rw-r--r--doc/src/guide/req.asciidoc3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/guide/req.asciidoc b/doc/src/guide/req.asciidoc
index 39fcde6..2dd0a86 100644
--- a/doc/src/guide/req.asciidoc
+++ b/doc/src/guide/req.asciidoc
@@ -258,7 +258,8 @@ QsVals = cowboy_req:parse_qs(Req),
Cowboy will only parse the query string, and not do any
transformation. This function may therefore return duplicates,
-or parameter names without an associated value.
+or parameter names without an associated value. The order of
+the list returned is undefined.
When a query string is `key=1&key=2`, the list returned will
contain two parameters of name `key`.