diff --git a/compiler/rustc_target/src/spec/i686_unknown_redox.rs b/compiler/rustc_target/src/spec/i686_unknown_redox.rs
new file mode 100644
index 0000000000000000000000000000000000000000..0be98b596d2f28ac0490ff190d42f02b21450984
--- /dev/null
+++ b/compiler/rustc_target/src/spec/i686_unknown_redox.rs
@@ -0,0 +1,20 @@
+use crate::spec::{LinkerFlavor, StackProbeType, Target};
+
+pub fn target() -> Target {
+    let mut base = super::redox_base::opts();
+    base.cpu = "pentiumpro".to_string();
+    base.max_atomic_width = Some(64);
+    base.pre_link_args.entry(LinkerFlavor::Gcc).or_default().push("-m32".to_string());
+    // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
+    base.stack_probes = StackProbeType::Call;
+
+    Target {
+        llvm_target: "i686-unknown-redox".to_string(),
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
+            f64:32:64-f80:32-n8:16:32-S128"
+            .to_string(),
+        arch: "x86".to_string(),
+        options: base,
+    }
+}
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 4f0c3bec1eecc329314da737f3a1bac44d6e10b8..efd0a1c50e5676a937d5055efcb94e7a6c7c3736 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -910,6 +910,7 @@ fn $module() {
     ("x86_64-unknown-l4re-uclibc", x86_64_unknown_l4re_uclibc),
 
     ("aarch64-unknown-redox", aarch64_unknown_redox),
+    ("i686-unknown-redox", i686_unknown_redox),
     ("x86_64-unknown-redox", x86_64_unknown_redox),
 
     ("i386-apple-ios", i386_apple_ios),