diff --git a/src/main/php/module.xp b/src/main/php/module.xp
index 409bfef3..82f404aa 100755
--- a/src/main/php/module.xp
+++ b/src/main/php/module.xp
@@ -7,7 +7,7 @@ module xp-framework/compiler {
 
   /** @return void */
   public function initialize() {
-    ClassLoader::registerLoader(CompilingClassloader::instanceFor('php:'.PHP_VERSION));
+    ClassLoader::registerLoader(CompilingClassloader::instanceFor('php:'.PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION.'.'.PHP_RELEASE_VERSION));
 
     if (!interface_exists(\IDisposable::class, false)) {
       eval('interface IDisposable { public function __dispose(); }');
diff --git a/src/main/php/xp/compiler/AstRunner.class.php b/src/main/php/xp/compiler/AstRunner.class.php
index 223389ae..5a5bccfa 100755
--- a/src/main/php/xp/compiler/AstRunner.class.php
+++ b/src/main/php/xp/compiler/AstRunner.class.php
@@ -72,7 +72,7 @@ public static function main(array $args) {
     }
 
     $lang= Language::named('PHP');
-    $emit= Emitter::forRuntime('php:'.PHP_VERSION)->newInstance();
+    $emit= Emitter::forRuntime('php:'.PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION.'.'.PHP_RELEASE_VERSION)->newInstance();
     foreach ($lang->extensions() as $extension) {
       $extension->setup($lang, $emit);
     }
diff --git a/src/main/php/xp/compiler/CompileRunner.class.php b/src/main/php/xp/compiler/CompileRunner.class.php
index e549f651..d311e920 100755
--- a/src/main/php/xp/compiler/CompileRunner.class.php
+++ b/src/main/php/xp/compiler/CompileRunner.class.php
@@ -65,7 +65,7 @@ private static function emitter(string $name): XPClass {
   public static function main(array $args) {
     if (empty($args)) return Usage::main($args);
 
-    $target= 'php:'.PHP_VERSION;
+    $target= 'php:'.PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION.'.'.PHP_RELEASE_VERSION;
     $in= $out= '-';
     $quiet= false;
     $augment= [];
diff --git a/src/main/php/xp/compiler/Usage.class.php b/src/main/php/xp/compiler/Usage.class.php
index 7b3d232c..874ac47f 100755
--- a/src/main/php/xp/compiler/Usage.class.php
+++ b/src/main/php/xp/compiler/Usage.class.php
@@ -6,7 +6,7 @@
 
 /** @codeCoverageIgnore */
 class Usage {
-  const RUNTIME = 'PHP';
+  const RUNTIME = 'php';
 
   /** @return int */
   public static function main(array $args) {
@@ -20,7 +20,7 @@ public function add($t, $active= false) {
       }
     };
 
-    $emitter= Emitter::forRuntime(self::RUNTIME.'.'.PHP_VERSION);
+    $emitter= Emitter::forRuntime(self::RUNTIME.':'.PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION.'.'.PHP_RELEASE_VERSION);
     foreach (Package::forName('lang.ast.emit')->getClasses() as $class) {
       if ($class->isSubclassOf(Emitter::class) && !(MODIFIER_ABSTRACT & $class->getModifiers())) {
         $impl->add($class, $class->equals($emitter));
diff --git a/src/test/php/lang/ast/unittest/loader/CompilingClassLoaderTest.class.php b/src/test/php/lang/ast/unittest/loader/CompilingClassLoaderTest.class.php
index 1ed682f0..9132a223 100755
--- a/src/test/php/lang/ast/unittest/loader/CompilingClassLoaderTest.class.php
+++ b/src/test/php/lang/ast/unittest/loader/CompilingClassLoaderTest.class.php
@@ -10,7 +10,7 @@ class CompilingClassLoaderTest {
   private static $runtime;
 
   static function __static() {
-    self::$runtime= 'php:'.PHP_VERSION;
+    self::$runtime= 'php:'.PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION.'.'.PHP_RELEASE_VERSION;
   }
 
   /**