Fix missing paren.
diff --git a/Doc/api/newtypes.tex b/Doc/api/newtypes.tex
index adfd2ba..1fadc46 100644
--- a/Doc/api/newtypes.tex
+++ b/Doc/api/newtypes.tex
@@ -854,7 +854,7 @@
     GC-related fields \member{tp_traverse} and \member{tp_clear} are
     present in the type object; but those fields also exist when
     \constant{Py_TPFLAGS_HAVE_GC} is clear but
-    \constant{Py_TPFLAGS_HAVE_RICHCOMPARE} is set).
+    \constant{Py_TPFLAGS_HAVE_RICHCOMPARE} is set.
   \end{datadesc}
 
   \begin{datadesc}{Py_TPFLAGS_DEFAULT}