diff --git a/crates/uv-configuration/src/target_triple.rs b/crates/uv-configuration/src/target_triple.rs
index 11bd09db2..35e71bb4e 100644
--- a/crates/uv-configuration/src/target_triple.rs
+++ b/crates/uv-configuration/src/target_triple.rs
@@ -21,11 +21,16 @@ pub enum TargetTriple {
     /// An alias for `aarch64-apple-darwin`, the default target for macOS.
     Macos,
 
-    /// An x86 Windows target.
+    /// A 64-bit x86 Windows target.
     #[cfg_attr(feature = "clap", value(name = "x86_64-pc-windows-msvc"))]
     #[cfg_attr(feature = "schemars", schemars(rename = "x86_64-pc-windows-msvc"))]
     X8664PcWindowsMsvc,
 
+    /// A 32-bit x86 Windows target.
+    #[cfg_attr(feature = "clap", value(name = "i686-pc-windows-msvc"))]
+    #[cfg_attr(feature = "schemars", schemars(rename = "i686-pc-windows-msvc"))]
+    I686PcWindowsMsvc,
+
     /// An x86 Linux target. Equivalent to `x86_64-manylinux_2_17`.
     #[cfg_attr(feature = "clap", value(name = "x86_64-unknown-linux-gnu"))]
     #[cfg_attr(feature = "schemars", schemars(rename = "x86_64-unknown-linux-gnu"))]
@@ -112,6 +117,7 @@ impl TargetTriple {
                 });
                 Platform::new(Os::Macos { major, minor }, Arch::Aarch64)
             }
+            Self::I686PcWindowsMsvc => Platform::new(Os::Windows, Arch::X86),
             Self::X8664AppleDarwin => {
                 let (major, minor) = macos_deployment_target().map_or((12, 0), |(major, minor)| {
                     debug!("Found macOS deployment target: {}.{}", major, minor);
@@ -183,6 +189,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "x86_64",
             Self::Linux | Self::X8664UnknownLinuxGnu => "x86_64",
             Self::Macos | Self::Aarch64AppleDarwin => "arm64",
+            Self::I686PcWindowsMsvc => "x86",
             Self::X8664AppleDarwin => "x86_64",
             Self::Aarch64UnknownLinuxGnu => "aarch64",
             Self::Aarch64UnknownLinuxMusl => "aarch64",
@@ -202,6 +209,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "Windows",
             Self::Linux | Self::X8664UnknownLinuxGnu => "Linux",
             Self::Macos | Self::Aarch64AppleDarwin => "Darwin",
+            Self::I686PcWindowsMsvc => "Windows",
             Self::X8664AppleDarwin => "Darwin",
             Self::Aarch64UnknownLinuxGnu => "Linux",
             Self::Aarch64UnknownLinuxMusl => "Linux",
@@ -221,6 +229,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "",
             Self::Linux | Self::X8664UnknownLinuxGnu => "",
             Self::Macos | Self::Aarch64AppleDarwin => "",
+            Self::I686PcWindowsMsvc => "",
             Self::X8664AppleDarwin => "",
             Self::Aarch64UnknownLinuxGnu => "",
             Self::Aarch64UnknownLinuxMusl => "",
@@ -240,6 +249,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "",
             Self::Linux | Self::X8664UnknownLinuxGnu => "",
             Self::Macos | Self::Aarch64AppleDarwin => "",
+            Self::I686PcWindowsMsvc => "",
             Self::X8664AppleDarwin => "",
             Self::Aarch64UnknownLinuxGnu => "",
             Self::Aarch64UnknownLinuxMusl => "",
@@ -259,6 +269,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "nt",
             Self::Linux | Self::X8664UnknownLinuxGnu => "posix",
             Self::Macos | Self::Aarch64AppleDarwin => "posix",
+            Self::I686PcWindowsMsvc => "nt",
             Self::X8664AppleDarwin => "posix",
             Self::Aarch64UnknownLinuxGnu => "posix",
             Self::Aarch64UnknownLinuxMusl => "posix",
@@ -278,6 +289,7 @@ impl TargetTriple {
             Self::Windows | Self::X8664PcWindowsMsvc => "win32",
             Self::Linux | Self::X8664UnknownLinuxGnu => "linux",
             Self::Macos | Self::Aarch64AppleDarwin => "darwin",
+            Self::I686PcWindowsMsvc => "win32",
             Self::X8664AppleDarwin => "darwin",
             Self::Aarch64UnknownLinuxGnu => "linux",
             Self::Aarch64UnknownLinuxMusl => "linux",
diff --git a/docs/reference/cli.md b/docs/reference/cli.md
index 8f4cfb441..849a99ec6 100644
--- a/docs/reference/cli.md
+++ b/docs/reference/cli.md
@@ -1691,7 +1691,9 @@ uv tree [OPTIONS]
 
 <li><code>macos</code>:  An alias for <code>aarch64-apple-darwin</code>, the default target for macOS</li>
 
-<li><code>x86_64-pc-windows-msvc</code>:  An x86 Windows target</li>
+<li><code>x86_64-pc-windows-msvc</code>:  A 64-bit x86 Windows target</li>
+
+<li><code>i686-pc-windows-msvc</code>:  A 32-bit x86 Windows target</li>
 
 <li><code>x86_64-unknown-linux-gnu</code>:  An x86 Linux target. Equivalent to <code>x86_64-manylinux_2_17</code></li>
 
@@ -3808,7 +3810,9 @@ uv pip compile [OPTIONS] <SRC_FILE>...
 
 <li><code>macos</code>:  An alias for <code>aarch64-apple-darwin</code>, the default target for macOS</li>
 
-<li><code>x86_64-pc-windows-msvc</code>:  An x86 Windows target</li>
+<li><code>x86_64-pc-windows-msvc</code>:  A 64-bit x86 Windows target</li>
+
+<li><code>i686-pc-windows-msvc</code>:  A 32-bit x86 Windows target</li>
 
 <li><code>x86_64-unknown-linux-gnu</code>:  An x86 Linux target. Equivalent to <code>x86_64-manylinux_2_17</code></li>
 
@@ -4104,7 +4108,9 @@ uv pip sync [OPTIONS] <SRC_FILE>...
 
 <li><code>macos</code>:  An alias for <code>aarch64-apple-darwin</code>, the default target for macOS</li>
 
-<li><code>x86_64-pc-windows-msvc</code>:  An x86 Windows target</li>
+<li><code>x86_64-pc-windows-msvc</code>:  A 64-bit x86 Windows target</li>
+
+<li><code>i686-pc-windows-msvc</code>:  A 32-bit x86 Windows target</li>
 
 <li><code>x86_64-unknown-linux-gnu</code>:  An x86 Linux target. Equivalent to <code>x86_64-manylinux_2_17</code></li>
 
@@ -4434,7 +4440,9 @@ uv pip install [OPTIONS] <PACKAGE|--requirement <REQUIREMENT>|--editable <EDITAB
 
 <li><code>macos</code>:  An alias for <code>aarch64-apple-darwin</code>, the default target for macOS</li>
 
-<li><code>x86_64-pc-windows-msvc</code>:  An x86 Windows target</li>
+<li><code>x86_64-pc-windows-msvc</code>:  A 64-bit x86 Windows target</li>
+
+<li><code>i686-pc-windows-msvc</code>:  A 32-bit x86 Windows target</li>
 
 <li><code>x86_64-unknown-linux-gnu</code>:  An x86 Linux target. Equivalent to <code>x86_64-manylinux_2_17</code></li>
 
diff --git a/uv.schema.json b/uv.schema.json
index 46067da3f..546e5a959 100644
--- a/uv.schema.json
+++ b/uv.schema.json
@@ -1310,12 +1310,19 @@
           ]
         },
         {
-          "description": "An x86 Windows target.",
+          "description": "A 64-bit x86 Windows target.",
           "type": "string",
           "enum": [
             "x86_64-pc-windows-msvc"
           ]
         },
+        {
+          "description": "A 32-bit x86 Windows target.",
+          "type": "string",
+          "enum": [
+            "i686-pc-windows-msvc"
+          ]
+        },
         {
           "description": "An x86 Linux target. Equivalent to `x86_64-manylinux_2_17`.",
           "type": "string",