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-rw-r--r--sysdeps/alpha/fpu/bits/mathdef.h4
-rw-r--r--sysdeps/m68k/fpu/bits/mathdef.h4
2 files changed, 6 insertions, 2 deletions
diff --git a/sysdeps/alpha/fpu/bits/mathdef.h b/sysdeps/alpha/fpu/bits/mathdef.h
index f5d5de8b12..30f93dda1c 100644
--- a/sysdeps/alpha/fpu/bits/mathdef.h
+++ b/sysdeps/alpha/fpu/bits/mathdef.h
@@ -23,7 +23,9 @@
/* FIXME! This file describes properties of the compiler, not the machine;
it should not be part of libc! */
-#if defined __USE_ISOC99 && defined _MATH_H
+#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
+# define _MATH_H_MATHDEF 1
+
# ifdef __GNUC__
# if __STDC__ == 1
diff --git a/sysdeps/m68k/fpu/bits/mathdef.h b/sysdeps/m68k/fpu/bits/mathdef.h
index 2f650ec8b5..c80dad3fe1 100644
--- a/sysdeps/m68k/fpu/bits/mathdef.h
+++ b/sysdeps/m68k/fpu/bits/mathdef.h
@@ -20,7 +20,9 @@
# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
#endif
-#if defined __USE_ISOC99 && defined _MATH_H
+#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
+# define _MATH_H_MATHDEF 1
+
/* The m68k FPUs evaluate all values in the 96 bit floating-point format
which is also available for the user as `long double'. Therefore we
define: */