diff --git a/src/helma/scripting/rhino/HopObjectCtor.java b/src/helma/scripting/rhino/HopObjectCtor.java
index a94f7fd3..de482ec2 100644
--- a/src/helma/scripting/rhino/HopObjectCtor.java
+++ b/src/helma/scripting/rhino/HopObjectCtor.java
@@ -109,7 +109,7 @@ public class HopObjectCtor extends FunctionObject {
     }
 
     public Object get(String name, Scriptable start) {
-        if (!initialized  && !"prototype".equals(name)) {
+        if (!initialized && core.isInitialized()) {
             // trigger prototype compilation on static
             // constructor property access
             initialized = true;
diff --git a/src/helma/scripting/rhino/RhinoCore.java b/src/helma/scripting/rhino/RhinoCore.java
index 1b0aa608..f7b4dbe3 100644
--- a/src/helma/scripting/rhino/RhinoCore.java
+++ b/src/helma/scripting/rhino/RhinoCore.java
@@ -78,6 +78,7 @@ public final class RhinoCore implements ScopeProvider {
     // debugger/tracer flags
     boolean hasDebugger = false;
     boolean hasTracer = false;
+    private boolean isInitialized = false;
 
     // dynamic portion of the type check sleep that grows
     // as the app remains unchanged
@@ -170,9 +171,14 @@ public final class RhinoCore implements ScopeProvider {
             throw new RuntimeException(e.getMessage(), e);
         } finally {
             contextFactory.exit();
+            isInitialized = true;
         }
     }
 
+    boolean isInitialized() {
+        return isInitialized;
+    }
+
     void initDebugger(Context context) {
         try {
             if (debugger == null) {