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-rw-r--r--doc/ref/api-control.texi3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/ref/api-control.texi b/doc/ref/api-control.texi
index 56ffba26b..7ffb3f740 100644
--- a/doc/ref/api-control.texi
+++ b/doc/ref/api-control.texi
@@ -1421,7 +1421,8 @@ Guile) formats using @code{display} and @code{~S} (was
@code{system-error} then it should be a list containing the
Unix @code{errno} value; If @var{key} is @code{signal} then it
should be a list containing the Unix signal number; If
-@var{key} is @code{out-of-range} or @code{wrong-type-arg},
+@var{key} is @code{out-of-range}, @code{wrong-type-arg},
+or @code{keyword-argument-error},
it is a list containing the bad value; otherwise
it will usually be @code{#f}.
@end deffn