diff --git a/utshell-0.5/r_expr/src/lib.rs b/utshell-0.5/r_expr/src/lib.rs
index 32532888709559b4ea090975076b8b6f0c5c3276..ec9502fc3792add2929c05efe5b0986266087c1c 100644
--- a/utshell-0.5/r_expr/src/lib.rs
+++ b/utshell-0.5/r_expr/src/lib.rs
@@ -45,4 +45,37 @@ use r_bash::this_command_name;
 use r_bash::top_level_cleanup;
 use r_bash::uintmax_t;
 use r_bash::unbound_vars_is_error;
-use r_bash::SHELL_VAR;
\ No newline at end of file
+use r_bash::SHELL_VAR;
+
+pub type intmax_t = libc::c_long;
+pub const EXP_EXPANDED: libc::c_int = 1;
+pub const ASS_NOEXPAND: libc::c_int = 128;
+pub const AV_NOEXPAND: libc::c_int = 0x20;
+pub const EXECUTION_FAILURE: libc::c_int = 1;
+pub const DISCARD: libc::c_int = 2;
+pub const FORCE_EOF: libc::c_int = 1;
+pub const PREINC: libc::c_int = 14;
+pub const PREDEC: libc::c_int = 15;
+pub const STR: libc::c_int = 5;
+pub const NUM: libc::c_int = 6;
+pub const POSTINC: libc::c_int = 16;
+pub const POSTDEC: libc::c_int = 17;
+pub const POWER: libc::c_int = 13;
+pub const LSH: libc::c_int = 9;
+pub const RSH: libc::c_int = 10;
+pub const LEQ: libc::c_int = 3;
+pub const GEQ: libc::c_int = 4;
+pub const EQEQ: libc::c_int = 1;
+pub const NEQ: libc::c_int = 2;
+pub const LAND: libc::c_int = 7;
+pub const LOR: libc::c_int = 8;
+pub const COND: libc::c_int = 12;
+pub const OP_ASSIGN: libc::c_int = 11;
+pub const MAX_EXPR_RECURSION_LEVEL: libc::c_int = 1024;
+pub const EXPR_STACK_GROW_SIZE: libc::c_int = 10;
+pub const EQ: libc::c_char = '=' as libc::c_char;
+pub const NOT: libc::c_char = '!' as libc::c_char;
+pub const GT: libc::c_char = '>' as libc::c_char;
+pub const LT: libc::c_char = '<' as libc::c_char;
+pub const BAND: libc::c_char = '&' as libc::c_char;
+pub const BOR: libc::c_char = '|' as libc::c_char;
\ No newline at end of file