diff --git a/config/source.json b/config/source.json
index 2beea67c..dcf2ec58 100644
--- a/config/source.json
+++ b/config/source.json
@@ -859,7 +859,7 @@
     "spx": {
         "type": "git",
         "rev": "master",
-        "url": "https://github.com/NoiseByNorthwest/php-spx.git",
+        "url": "https://github.com/henderkes/php-spx.git",
         "path": "php-src/ext/spx",
         "license": {
             "type": "file",
diff --git a/src/SPC/builder/extension/spx.php b/src/SPC/builder/extension/spx.php
index ef9e95bf..9e3ead3a 100644
--- a/src/SPC/builder/extension/spx.php
+++ b/src/SPC/builder/extension/spx.php
@@ -12,7 +12,7 @@ class spx extends Extension
 {
     public function getUnixConfigureArg(bool $shared = false): string
     {
-        $arg = '--enable-SPX';
+        $arg = '--enable-spx' . ($shared ? '=shared' : '');
         if ($this->builder->getExt('zlib') === null) {
             $arg .= ' --with-zlib-dir=' . BUILD_ROOT_PATH;
         }