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diff --git a/manual/math.texi b/manual/math.texi
index 4aaa106..dcff7b7 100644
--- a/manual/math.texi
+++ b/manual/math.texi
@@ -2010,12 +2010,6 @@ might have a reduced precision and/or argument range in comparison with
the library functions. The latter inline functions are only available
if the flag @code{-ffast-math} is given to GNU CC.
-In cases where the inline functions and macros are not wanted the symbol
-@code{__NO_MATH_INLINES} should be defined before any system header is
-included. This will ensure that only library functions are used. Of
-course, it can be determined for each file in the project whether
-giving this option is preferable or not.
-
Not all hardware implements the entire @w{IEEE 754} standard, and even
if it does there may be a substantial performance penalty for using some
of its features. For example, enabling traps on some processors forces