diff --git a/sysdeps/alpha/fpu/bits/mathdef.h b/sysdeps/alpha/fpu/bits/mathdef.h
index 0bc9c94ecc..1c259403f5 100644
--- a/sysdeps/alpha/fpu/bits/mathdef.h
+++ b/sysdeps/alpha/fpu/bits/mathdef.h
@@ -17,38 +17,38 @@
    Boston, MA 02111-1307, USA.  */
 
 #ifndef _MATH_H
-#error "Never use <bits/mathdef.h> directly; include <math.h> instead"
+# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
 #endif
 
 /* FIXME! This file describes properties of the compiler, not the machine;
    it should not be part of libc!  */
 
 #ifdef __GNUC__
-#if __STDC__ == 1
+# if __STDC__ == 1
 
 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
 typedef float float_t;
 typedef double double_t;
 
 /* Signal that types stay as they were declared.  */
-#define FLT_EVAL_METHOD	0
+#  define FLT_EVAL_METHOD	0
 
-/* Define `INFINITY' as value of type `float_t'.  */
-#define INFINITY	HUGE_VALF
+/* Define `INFINITY' as value of type `float'.  */
+#  define INFINITY	HUGE_VALF
 
-#else 
+# else
 
 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
 typedef double float_t;
 typedef double double_t;
 
 /* Signal that both types are `double'.  */
-#define FLT_EVAL_METHOD	1
+#  define FLT_EVAL_METHOD	1
 
-/* Define `INFINITY' as value of type `float_t'.  */
-#define INFINITY	HUGE_VAL
+/* Define `INFINITY' as value of type `float'.  */
+#  define INFINITY	HUGE_VALF
 
-#endif
+# endif
 #else
 
 /* Wild guess at types for float_t and double_t. */
@@ -56,9 +56,12 @@ typedef double float_t;
 typedef double double_t;
 
 /* Strange compiler, we don't know how it works.  */
-#define FLT_EVAL_METHOD	-1
+# define FLT_EVAL_METHOD	-1
 
-/* Define `INFINITY' as value of type `float_t'.  */
-#define INFINITY	HUGE_VAL
+/* Define `INFINITY' as value of type `float'.  */
+# define INFINITY	HUGE_VALF
 
 #endif
+
+/* Number of decimal digits for the `double' type.  */
+#define DECIMAL_DIG	15
diff --git a/sysdeps/m68k/fpu/bits/mathdef.h b/sysdeps/m68k/fpu/bits/mathdef.h
index c2b4eff920..e3d33a53a2 100644
--- a/sysdeps/m68k/fpu/bits/mathdef.h
+++ b/sysdeps/m68k/fpu/bits/mathdef.h
@@ -32,9 +32,12 @@ typedef long double double_t;	/* `double' expressions are evaluated as
 /* Signal that both types are `long double'.  */
 #define FLT_EVAL_METHOD	2
 
-/* Define `INFINITY' as value of type `float_t'.  */
-#define INFINITY	HUGE_VALL
+/* Define `INFINITY' as value of type `float'.  */
+#define INFINITY	HUGE_VALF
 
 /* The values returned by `ilogb' for 0 and NaN respectively.  */
 #define FP_ILOGB0	0x80000000
 #define FP_ILOGBNAN	0x7fffffff
+
+/* Number of decimal digits for the `long double' type.  */
+#define DECIMAL_DIG	18