diff --git a/ChangeLog b/ChangeLog
index 0ff4b7184..e603d9aec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2000-05-04  Arno W. Peters  <A.W.Peters@ieee.org>
+
+	* src/maths/ni/nipzmeth.c: Corrected an overeager deletion.
+
 2000-05-03  Arno W. Peters  <A.W.Peters@ieee.org>
 
 	* source tree: removed most of `#ifdef notdef' and made converted
diff --git a/src/maths/ni/nipzmeth.c b/src/maths/ni/nipzmeth.c
index db6b7421a..9c7f47566 100644
--- a/src/maths/ni/nipzmeth.c
+++ b/src/maths/ni/nipzmeth.c
@@ -26,43 +26,7 @@ int	NIpzK_mag;
 int
 NIpzSym(PZtrial **set, PZtrial *new)
 {
-    double	a, b, c, x0, x1;
-    double	dx0, dx1;
-    int		a_mag, b_mag, c_mag;
-
-    dx0 = set[1]->s.real - set[0]->s.real;
-    dx1 = set[2]->s.real - set[1]->s.real;
-
-    zaddeq(&a, &a_mag, set[1]->f_def.real, set[1]->mag_def,
-	-set[0]->f_def.real, set[0]->mag_def);
-    a /= dx0;
-    zaddeq(&b, &b_mag, set[2]->f_def.real, set[2]->mag_def,
-	-set[1]->f_def.real, set[1]->mag_def);
-    b /= dx1;
-    zaddeq(&c, &c_mag, b, b_mag, -a, a_mag);
-
-    /* XXX What if c == 0.0 ? */
-
-    x0 = (set[0]->s.real + set[1]->s.real) / 2.0;
-    x1 = (set[1]->s.real + set[2]->s.real) / 2.0;
-
-    c /= (x1 - x0);
-
-    new->s.real = - a / c;
-    c_mag -= a_mag;
-
-    new->s.imag = 0.0;
-
-    while (c_mag > 0) {
-	new->s.real /= 2.0;
-	c_mag -= 1;
-    }
-    while (c_mag < 0) {
-	new->s.real *= 2.0;
-	c_mag += 1;
-    }
-    new->s.real += set[0]->s.real;
-#endif
+    return NIpzSym2(set, new);
 }
 
 int