diff --git a/winsup/mingw/ChangeLog b/winsup/mingw/ChangeLog
index 24cdb4744..1dfc668b9 100644
--- a/winsup/mingw/ChangeLog
+++ b/winsup/mingw/ChangeLog
@@ -1,3 +1,7 @@
+2003-10-21  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	* include/math.h (cabs): Remove non-ISO prototype.
+
 2003-10-21  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* mingwex/math/cephes_mconf.h (NAN, NANF, NANL):
diff --git a/winsup/mingw/include/math.h b/winsup/mingw/include/math.h
index 03636f133..af6a40f22 100644
--- a/winsup/mingw/include/math.h
+++ b/winsup/mingw/include/math.h
@@ -175,7 +175,9 @@ _CRTIMP double __cdecl fmod (double, double);
 
 #ifndef __STRICT_ANSI__
 
-/* Complex number (for cabs). This really belongs in complex.h */
+/* Complex number (for _cabs). This is the MS version. The ISO
+   C99 counterpart _Complex is an intrinsic type in GCC and
+   'complex' is defined as a macro.  See complex.h  */
 struct _complex
 {
 	double	x;	/* Real part */
@@ -220,7 +222,6 @@ _CRTIMP int __cdecl _isnan (double);
 
 #if !defined (_NO_OLDNAMES)
 
-_CRTIMP double __cdecl cabs (struct _complex);
 _CRTIMP double __cdecl j0 (double);
 _CRTIMP double __cdecl j1 (double);
 _CRTIMP double __cdecl jn (int, double);