diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi
index 4b62eee56e2..3b525996d6f 100644
--- a/doc/misc/calc.texi
+++ b/doc/misc/calc.texi
@@ -6217,7 +6217,7 @@ method when it is able.  @xref{Programming Answer 8, 8}. (@bullet{})
 @cindex Gamma constant, Euler's
 @cindex Euler's gamma constant
 (@bullet{}) @strong{Exercise 9.}  The @dfn{digamma} function
-@texline @math{\psi(z) (``psi'')}
+@texline @math{\psi(z)} (``psi'')
 @infoline @expr{psi(z)}
 is defined as the derivative of
 @texline @math{\ln \Gamma(z)}.