diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog
index df729b32ce..cd7813b7ac 100644
--- a/sim/ppc/ChangeLog
+++ b/sim/ppc/ChangeLog
@@ -9,6 +9,8 @@ Fri May 24 10:08:10 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 
 	* emul_netbsd.c: Add support for missing system calls, and/or
 	missing stat fields.
+	(MAXPATHLEN): Undefine if including unistd.h, since sys/param.h
+	might define it.
 
 	* hw_pal.c (WITH_STDIO): Redefine if O_NDELAY, F_GETFL, or F_SETFL
 	are not defined.
diff --git a/sim/ppc/emul_netbsd.c b/sim/ppc/emul_netbsd.c
index cc6fe89305..51af331691 100644
--- a/sim/ppc/emul_netbsd.c
+++ b/sim/ppc/emul_netbsd.c
@@ -83,6 +83,7 @@ int getrusage();
 #endif
 
 #ifdef HAVE_UNISTD_H
+#undef MAXPATHLEN		/* sys/param.h might define this also */
 #include <unistd.h>
 #endif