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-rw-r--r--libc/sysdeps/linux/common/bits/mathcalls.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/bits/mathcalls.h b/libc/sysdeps/linux/common/bits/mathcalls.h
index 811738238..df2e21cc8 100644
--- a/libc/sysdeps/linux/common/bits/mathcalls.h
+++ b/libc/sysdeps/linux/common/bits/mathcalls.h
@@ -244,6 +244,7 @@ __END_NAMESPACE_C99
/* Return nonzero if VALUE is not a number. */
__MATHDECL_PRIV (int,isnan,, (_Mdouble_ __value), (__const__))
+# ifdef __DO_XSI_MATH__
/* Bessel functions. */
__MATHCALL (j0,, (_Mdouble_))
__MATHCALL (j1,, (_Mdouble_))
@@ -251,6 +252,7 @@ __MATHCALL (jn,, (int, _Mdouble_))
__MATHCALL (y0,, (_Mdouble_))
__MATHCALL (y1,, (_Mdouble_))
__MATHCALL (yn,, (int, _Mdouble_))
+# endif
#endif