diff --git a/jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn.mod b/jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn.mod
index 256ed05d56a..bd99ae571c2 100644
--- a/jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn.mod
+++ b/jetty-alpn/jetty-alpn-server/src/main/config/modules/alpn.mod
@@ -5,7 +5,7 @@ Enables the ALPN (Application Layer Protocol Negotiation) TLS extension.
 
 [depend]
 ssl
-alpn-impl/alpn-available-${java.feature.alpn}
+alpn-impl/alpn-available-${runtime.feature.alpn}
 
 [lib]
 lib/jetty-alpn-client-${jetty.version}.jar
diff --git a/jetty-start/src/main/java/org/eclipse/jetty/start/StartArgs.java b/jetty-start/src/main/java/org/eclipse/jetty/start/StartArgs.java
index b3353978fd0..ef74db738eb 100644
--- a/jetty-start/src/main/java/org/eclipse/jetty/start/StartArgs.java
+++ b/jetty-start/src/main/java/org/eclipse/jetty/start/StartArgs.java
@@ -1507,9 +1507,10 @@ public class StartArgs
                 properties.setProperty("java.version.platform", Integer.toString(ver.getPlatform()), source);
 
                 // features built into java.
-                properties.setProperty("java.feature.alpn", Boolean.toString(ver.getPlatform() >= 9), source);
-                properties.setProperty("java.feature.jpms", Boolean.toString(ver.getPlatform() >= 9), source);
-                properties.setProperty("java.feature.loom", Boolean.toString(ver.getPlatform() >= 16), source);
+                // TODO: Remove in Jetty 10+
+                properties.setProperty("runtime.feature.alpn", Boolean.toString(isMethodAvailable(javax.net.ssl.SSLParameters.class, "getApplicationProtocols", null)), source);
+                // TODO: Remove in Jetty 10+
+                properties.setProperty("runtime.feature.jpms", Boolean.toString(isClassAvailable("java.lang.ModuleLayer")), source);
 
                 // @deprecated - below will be removed in Jetty 10.x
                 properties.setProperty("java.version.major", Integer.toString(ver.getMajor()), "Deprecated");
@@ -1531,6 +1532,32 @@ public class StartArgs
         }
     }
 
+    private boolean isMethodAvailable(Class<?> clazz, String methodName, Class<?>[] params)
+    {
+        try
+        {
+            clazz.getMethod(methodName, params);
+            return true;
+        }
+        catch (NoSuchMethodException e)
+        {
+            return false;
+        }
+    }
+
+    private boolean isClassAvailable(String clazzname)
+    {
+        try
+        {
+            Class.forName(clazzname, false, this.getClass().getClassLoader());
+            return true;
+        }
+        catch (ClassNotFoundException e)
+        {
+            return false;
+        }
+    }
+
     public void setRun(boolean run)
     {
         this.run = run;