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-rw-r--r--sysdeps/sparc/fpu/bits/mathdef.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/sysdeps/sparc/fpu/bits/mathdef.h b/sysdeps/sparc/fpu/bits/mathdef.h
index c58167ce83..9477790654 100644
--- a/sysdeps/sparc/fpu/bits/mathdef.h
+++ b/sysdeps/sparc/fpu/bits/mathdef.h
@@ -25,7 +25,9 @@
 /* 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