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-rw-r--r--sysdeps/m68k/fpu/bits/mathdef.h4
1 files changed, 3 insertions, 1 deletions
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: */