diff --git a/packages/sysutils/busybox/package.mk b/packages/sysutils/busybox/package.mk
index 8365016ddd..8491f96dbe 100644
--- a/packages/sysutils/busybox/package.mk
+++ b/packages/sysutils/busybox/package.mk
@@ -208,6 +208,7 @@ makeinstall_init() {
   cp ${PKG_DIR}/scripts/init ${INSTALL}
   sed -e "s/@DISTRONAME@/${DISTRONAME}/g" \
       -e "s/@KERNEL_NAME@/${KERNEL_NAME}/g" \
+      -e "s/@SYSTEM_SIZE@/${SYSTEM_SIZE}/g" \
       -i ${INSTALL}/init
   chmod 755 ${INSTALL}/init
 }
diff --git a/packages/sysutils/busybox/scripts/init b/packages/sysutils/busybox/scripts/init
index 050ad1387d..7d7ad04bae 100755
--- a/packages/sysutils/busybox/scripts/init
+++ b/packages/sysutils/busybox/scripts/init
@@ -916,7 +916,7 @@ check_update() {
     echo ""
     echo "You must re-install your system using the disk image of a"
     echo "current release, or you must re-size your existing partitions"
-    echo "so that the System (FAT) partition is at least 512MB in size."
+    echo "so that the System (FAT) partition is at least @SYSTEM_SIZE@MB in size."
     echo ""
     do_cleanup
     StartProgress countdown "Normal startup in 60s... " 60 "NOW"