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-rw-r--r--doc/api.texi2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/api.texi b/doc/api.texi
index 96ac394..68cffef 100644
--- a/doc/api.texi
+++ b/doc/api.texi
@@ -581,7 +581,7 @@ approximation that is ``good enough.''
Half of @var{pi}.
@end defvar
-@defvar 2pi
+@defvar tau
Twice @var{pi}.
@end defvar