--- /dev/null
+--- busybox.orig/shell/ash.c
++++ busybox/shell/ash.c
+@@ -1748,7 +1748,7 @@
+ { VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL\0" , changemail },
+ { VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH\0", changemail },
+ #endif
+- { VSTRFIXED|VTEXTFIXED , bb_PATH_root_path, changepath },
++ { VSTRFIXED|VTEXTFIXED|VEXPORT, bb_PATH_root_path, changepath },
+ { VSTRFIXED|VTEXTFIXED , "PS1=$ " , NULL },
+ { VSTRFIXED|VTEXTFIXED , "PS2=> " , NULL },
+ { VSTRFIXED|VTEXTFIXED , "PS4=+ " , NULL },