diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e5ca49806d5..1862fed6c83 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+Wed Feb 16 19:00:02 2000  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	From 2000-01-26 Rodney Brown <RodneyBrown@pmsc.com>:
+        * procfs.c: Define MERGEPID if not defined. For osf4.0e.
+
 2000-02-15  Jason Molenda  (jsm@bugshack.cygnus.com)
 
 	* Makefile.in (diststuff): Run 'diststuff' in doc/ subdir, not
diff --git a/gdb/procfs.c b/gdb/procfs.c
index 920019fae17..b1080783498 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -293,6 +293,8 @@ typedef prstatus_t gdb_lwpstatus_t;
 #ifndef PIDGET
 #define PIDGET(PID)		(PID)
 #define TIDGET(PID)		(PID)
+#endif
+#ifndef MERGEPID
 #define MERGEPID(PID, TID)	(PID)
 #endif