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-rwxr-xr-xdoc/ref/scheme-data.texi3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/ref/scheme-data.texi b/doc/ref/scheme-data.texi
index 5046f052c..724a8c4f8 100755
--- a/doc/ref/scheme-data.texi
+++ b/doc/ref/scheme-data.texi
@@ -859,7 +859,8 @@ Return the arccosine of @var{z}.
@rnindex atan
@c begin (texi-doc-string "guile" "atan")
@deffn {Scheme Procedure} atan z
-Return the arctangent of @var{z}.
+@deffnx {Scheme Procedure} atan y x
+Return the arctangent of @var{z}, or of @math{@var{y}/@var{x}}.
@end deffn
@rnindex exp