diff --git a/usr.sbin/ppp/Makefile b/usr.sbin/ppp/Makefile
index 140a6a2f00cc..c10dc7f99e09 100644
--- a/usr.sbin/ppp/Makefile
+++ b/usr.sbin/ppp/Makefile
@@ -22,6 +22,10 @@ BINGRP=	network
 CFLAGS+=-DRELEASE_CRUNCH
 .endif
 
+.if defined(PPP_CONFDIR) && !empty(PPP_CONFDIR)
+CFLAGS+=-DPPP_CONFDIR=${PPP_CONFDIR}
+.endif
+
 .if defined(NOKLDLOAD)
 CFLAGS+=-DNOKLDLOAD
 .endif
diff --git a/usr.sbin/ppp/defs.h b/usr.sbin/ppp/defs.h
index 9432470db840..088444f4cd5e 100644
--- a/usr.sbin/ppp/defs.h
+++ b/usr.sbin/ppp/defs.h
@@ -32,7 +32,9 @@
 #endif
 #define NMODEMS		2
 
-#define _PATH_PPP	"/etc/ppp"
+#ifndef PPP_CONFDIR
+#define PPP_CONFDIR	"/etc/ppp"
+#endif
 
 #define TUN_NAME	"tun"
 #define TUN_PREFIX	(_PATH_DEV TUN_NAME)	/* /dev/tun */
diff --git a/usr.sbin/ppp/main.c b/usr.sbin/ppp/main.c
index ecc2e0fc24af..628f2bcc1e7b 100644
--- a/usr.sbin/ppp/main.c
+++ b/usr.sbin/ppp/main.c
@@ -327,7 +327,7 @@ main(int argc, char **argv)
   if (ID0realuid() != 0) {
     char conf[200], *ptr;
 
-    snprintf(conf, sizeof conf, "%s/%s", _PATH_PPP, CONFFILE);
+    snprintf(conf, sizeof conf, "%s/%s", PPP_CONFDIR, CONFFILE);
     do {
       struct stat sb;
 
diff --git a/usr.sbin/ppp/systems.c b/usr.sbin/ppp/systems.c
index 1b458534f958..2dc9c3fc3619 100644
--- a/usr.sbin/ppp/systems.c
+++ b/usr.sbin/ppp/systems.c
@@ -45,7 +45,7 @@ OpenSecret(const char *file)
   FILE *fp;
   char line[100];
 
-  snprintf(line, sizeof line, "%s/%s", _PATH_PPP, file);
+  snprintf(line, sizeof line, "%s/%s", PPP_CONFDIR, file);
   fp = ID0fopen(line, "r");
   if (fp == NULL)
     log_Printf(LogWARN, "OpenSecret: Can't open %s.\n", line);
@@ -325,7 +325,7 @@ ReadSystem(struct bundle *bundle, const char *name, const char *file,
   if (*file == '/')
     snprintf(filename, sizeof filename, "%s", file);
   else
-    snprintf(filename, sizeof filename, "%s/%s", _PATH_PPP, file);
+    snprintf(filename, sizeof filename, "%s/%s", PPP_CONFDIR, file);
   fp = ID0fopen(filename, "r");
   if (fp == NULL) {
     log_Printf(LogDEBUG, "ReadSystem: Can't open %s.\n", filename);
@@ -448,7 +448,7 @@ system_IsValid(const char *name, struct prompt *prompt, int mode)
       return "Configuration label not found";
 
     if (rs == -2)
-      return _PATH_PPP "/" CONFFILE ": File not found";
+      return PPP_CONFDIR "/" CONFFILE " : File not found";
   }
 
   if (userok == -1)