diff --git a/os_info/src/bitness.rs b/os_info/src/bitness.rs
index 28b6d0ce..16b4dc76 100644
--- a/os_info/src/bitness.rs
+++ b/os_info/src/bitness.rs
@@ -78,6 +78,19 @@ pub fn get() -> Bitness {
     }
 }
 
+#[cfg(target_os = "illumos")]
+pub fn get() -> Bitness {
+    match &Command::new("uname").arg("-p").output() {
+        Ok(Output { stdout, .. }) if stdout == b"amd64\n" => Bitness::X64,
+        Ok(Output { stdout, .. }) if stdout == b"x86_64\n" => Bitness::X64,
+        Ok(Output { stdout, .. }) if stdout == b"i386\n" => Bitness::X32,
+        Ok(Output { stdout, .. }) if stdout == b"aarch64\n" => Bitness::X64,
+        Ok(Output { stdout, .. }) if stdout == b"earmv7hf\n" => Bitness::X32,
+        Ok(Output { stdout, .. }) if stdout == b"sparc64\n" => Bitness::X64,
+        _ => Bitness::Unknown,
+    }
+}
+
 #[cfg(all(
     test,
     any(