diff --git a/n_atof.c b/n_atof.c
index 4809d8c4..15907578 100644
--- a/n_atof.c
+++ b/n_atof.c
@@ -68,21 +68,22 @@
  */
 
 JNUMBER
-JAtoN(string, endPtr)
-const char *string;         /* A decimal ASCII floating-point number,
-                                 * optionally preceded by white space.
-                                 * Must have form "-I.FE-X", where I is the
-                                 * integer part of the mantissa, F is the
-                                 * fractional part of the mantissa, and X
-                                 * is the exponent.  Either of the signs
-                                 * may be "+", "-", or omitted.  Either I
-                                 * or F may be omitted, or both.  The decimal
-                                 * point isn't necessary unless F is present.
-                                 * The "E" may actually be an "e".  E and X
-                                 * may both be omitted (but not just one).
-                                 */
-char **endPtr;              /* If non-NULL, store terminating character's
-                                 * address here. */
+JAtoN(
+    const char *string, /* A decimal ASCII floating-point number,
+                         * optionally preceded by white space.
+                         * Must have form "-I.FE-X", where I is the
+                         * integer part of the mantissa, F is the
+                         * fractional part of the mantissa, and X
+                         * is the exponent.  Either of the signs
+                         * may be "+", "-", or omitted.  Either I
+                         * or F may be omitted, or both.  The decimal
+                         * point isn't necessary unless F is present.
+                         * The "E" may actually be an "e".  E and X
+                         * may both be omitted (but not just one).
+                         */
+    char **endPtr         /* If non-NULL, store terminating character's
+                           * address here. */
+)
 {
     int sign, expSign = FALSE;
     JNUMBER fraction;