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-rw-r--r--docs/markdown/Reference-manual.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/markdown/Reference-manual.md b/docs/markdown/Reference-manual.md
index 9f49831..12018fc 100644
--- a/docs/markdown/Reference-manual.md
+++ b/docs/markdown/Reference-manual.md
@@ -1644,7 +1644,7 @@ the following methods:
`args` keyword, you can specify external dependencies to use with
`dependencies` keyword argument.
-- `check_header` returns true if the specified header is *usable* with
+- `check_header` *(added 0.47.0)* returns true if the specified header is *usable* with
the specified prefix, dependencies, and arguments.
You can specify external dependencies to use with `dependencies`
keyword argument and extra code to put above the header test with