diff --git a/package/ppp/files/etc/ppp/ip-down b/package/ppp/files/etc/ppp/ip-down
index 30151f426d..4c8ee639bc 100755
--- a/package/ppp/files/etc/ppp/ip-down
+++ b/package/ppp/files/etc/ppp/ip-down
@@ -1,4 +1,5 @@
 #!/bin/sh
+. /etc/functions.sh
 PPP_IFACE="$1"
 PPP_TTY="$2"
 PPP_SPEED="$3"
diff --git a/package/ppp/files/etc/ppp/ip-up b/package/ppp/files/etc/ppp/ip-up
index 30db93e10b..086efed958 100755
--- a/package/ppp/files/etc/ppp/ip-up
+++ b/package/ppp/files/etc/ppp/ip-up
@@ -1,4 +1,5 @@
 #!/bin/sh
+. /etc/functions.sh
 PPP_IFACE="$1"
 PPP_TTY="$2"
 PPP_SPEED="$3"