diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f57df7f90f..eb30b333e2 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,7 @@
 2001-09-08  Mark Kettenis  <kettenis@gnu.org>
 
+	* config/xm-aix4.h (MEM_FNS_DECLARED): Removed.
+
 	* config/arm/xm-linux.h, config/ia64/xm-linux.h,
 	config/m68k/xm-linux.h, config/mips/xm-linux.h,
 	config/powerpc/xm-linux.h, config/sparc/xm-linux.h: Remove
diff --git a/gdb/config/xm-aix4.h b/gdb/config/xm-aix4.h
index 2d286c1ddc..dc0aae7606 100644
--- a/gdb/config/xm-aix4.h
+++ b/gdb/config/xm-aix4.h
@@ -47,11 +47,6 @@
 
 #define FIVE_ARG_PTRACE
 
-/* AIX declares the mem functions differently than defs.h does.  AIX is
-   right, but defs.h works on more old systems.  For now, override it.  */
-
-#define MEM_FNS_DECLARED 1
-
 /* This system requires that we open a terminal with O_NOCTTY for it to
    not become our controlling terminal.  */