diff --git a/gprof/ChangeLog b/gprof/ChangeLog
index e921ffc6c8..8be42e9aca 100644
--- a/gprof/ChangeLog
+++ b/gprof/ChangeLog
@@ -1,3 +1,10 @@
+1999-09-29  Mark Kettenis  <kettenis@gnu.org>
+
+        * hertz.h [MACH] (hertz): Remove macro.  The
+        <machine/mach_param.h> include doesn't exist on al Mach based
+        systems, and the definition of hertz breaks compilation of hertz.c
+        anyway.
+
 2000-02-22  Ian Lance Taylor  <ian@zembu.com>
 
 	From Brad Lucier <lucier@math.purdue.edu>:
diff --git a/gprof/hertz.h b/gprof/hertz.h
index 2ea01bac88..fc30a1f9d7 100644
--- a/gprof/hertz.h
+++ b/gprof/hertz.h
@@ -10,13 +10,6 @@
  * we return HZ_WRONG, an impossible sampling frequency.
  */
 
-/* FIXME: Checking for MACH here makes no sense when for a cross
-   gprof.  */
-#ifdef MACH
-#include <machine/mach_param.h>
-#define hertz() (HZ)
-#else
 extern int hertz PARAMS ((void));
-#endif
 
 #endif /* hertz_h */