diff --git a/src/SPC/builder/Extension.php b/src/SPC/builder/Extension.php
index 57ed9dd3..bc475d11 100644
--- a/src/SPC/builder/Extension.php
+++ b/src/SPC/builder/Extension.php
@@ -576,7 +576,7 @@ class Extension
 
     protected function getExtraEnv(): array
     {
-        return ['CFLAGS' => '-std=c17'];
+        return ['CFLAGS' => ''];
     }
 
     /**
diff --git a/src/SPC/builder/extension/mongodb.php b/src/SPC/builder/extension/mongodb.php
index 745417bb..08861e4e 100644
--- a/src/SPC/builder/extension/mongodb.php
+++ b/src/SPC/builder/extension/mongodb.php
@@ -24,4 +24,9 @@ class mongodb extends Extension
         $arg .= $this->builder->getLib('zlib') ? ' --with-mongodb-zlib=yes ' : ' --with-mongodb-zlib=bundled ';
         return clean_spaces($arg);
     }
+
+    public function getExtraEnv(): array
+    {
+        return ['CFLAGS' => '-std=c17'];
+    }
 }