diff --git a/src/builtins/ulimit.rs b/src/builtins/ulimit.rs
index a1640ef71..cd7fe0136 100644
--- a/src/builtins/ulimit.rs
+++ b/src/builtins/ulimit.rs
@@ -24,7 +24,7 @@ pub mod common {
         pub const DATA: libc::c_int = libc::RLIMIT_DATA as _;
         pub const FSIZE: libc::c_int = libc::RLIMIT_FSIZE as _;
         cfg_if!(
-            if #[cfg(cygwin)] {
+            if #[cfg(any(cygwin, target_os = "illumos"))] {
                 pub const MEMLOCK: libc::c_int = -1;
             } else {
                 pub const MEMLOCK: libc::c_int = libc::RLIMIT_MEMLOCK as _;
@@ -34,7 +34,7 @@ pub mod common {
         pub const STACK: libc::c_int = libc::RLIMIT_STACK as _;
         pub const CPU: libc::c_int = libc::RLIMIT_CPU as _;
         cfg_if!(
-            if #[cfg(cygwin)] {
+            if #[cfg(any(cygwin, target_os = "illumos"))] {
                 pub const NPROC: libc::c_int = -1;
             } else {
                 pub const NPROC: libc::c_int = libc::RLIMIT_NPROC as _;