diff --git a/config/pkg/ext/ext-xlswriter.yml b/config/pkg/ext/ext-xlswriter.yml
index 24d2fa3c..c13751af 100644
--- a/config/pkg/ext/ext-xlswriter.yml
+++ b/config/pkg/ext/ext-xlswriter.yml
@@ -16,3 +16,4 @@ ext-xlswriter:
     support:
       BSD: wip
     arg-type: custom
+    arg-type@windows: '--with-xlswriter'
diff --git a/src/Package/Extension/xlswriter.php b/src/Package/Extension/xlswriter.php
index b2f25716..ae11f307 100644
--- a/src/Package/Extension/xlswriter.php
+++ b/src/Package/Extension/xlswriter.php
@@ -4,10 +4,14 @@ declare(strict_types=1);
 
 namespace Package\Extension;
 
+use Package\Target\php;
+use StaticPHP\Attribute\Package\BeforeStage;
 use StaticPHP\Attribute\Package\CustomPhpConfigureArg;
 use StaticPHP\Attribute\Package\Extension;
+use StaticPHP\Attribute\PatchDescription;
 use StaticPHP\Package\PackageInstaller;
 use StaticPHP\Package\PhpExtensionPackage;
+use StaticPHP\Util\SourcePatcher;
 
 #[Extension('xlswriter')]
 class xlswriter extends PhpExtensionPackage
@@ -22,4 +26,17 @@ class xlswriter extends PhpExtensionPackage
         }
         return $arg;
     }
+
+    #[BeforeStage('php', [php::class, 'makeForWindows'], 'ext-xlswriter')]
+    #[PatchDescription('Fix Windows build: apply win32 patch and add UTF-8 BOM to theme.c')]
+    public function patchBeforeMakeForWindows(): void
+    {
+        // fix windows build with openssl extension duplicate symbol bug
+        SourcePatcher::patchFile('spc_fix_xlswriter_win32.patch', $this->getSourceDir());
+        $content = file_get_contents($this->getSourceDir() . '/library/libxlsxwriter/src/theme.c');
+        $bom = pack('CCC', 0xEF, 0xBB, 0xBF);
+        if (!str_starts_with($content, $bom)) {
+            file_put_contents($this->getSourceDir() . '/library/libxlsxwriter/src/theme.c', $bom . $content);
+        }
+    }
 }