diff --git a/framework/src/main/java/org/apache/felix/framework/Felix.java b/framework/src/main/java/org/apache/felix/framework/Felix.java
index ba0caf3..a6c6c25 100644
--- a/framework/src/main/java/org/apache/felix/framework/Felix.java
+++ b/framework/src/main/java/org/apache/felix/framework/Felix.java
@@ -2336,8 +2336,6 @@
 
                 verifyExecutionEnvironment(bundle);
 
-                checkFragment(bundle);
-
                 addSecurity(bundle);
 
                 if (!bundle.getInfo().isExtension())
@@ -2472,21 +2470,6 @@
     }
 
     /**
-     * Checks whether bundle is a fragment bundle, and if so, logs a warning as fragment bundles
-     * are not yet supported by Felix.
-     * @param bundle The bundle to verify
-    **/
-    private void checkFragment(FelixBundle bundle)
-    {
-        String fragmentHost = (String) bundle.getInfo().getCurrentHeader().get(Constants.FRAGMENT_HOST);
-        if (fragmentHost != null)
-        {
-            m_logger.log(Logger.LOG_WARNING, "Bundle " + bundle.getBundleId()
-                + " is a fragment bundle; fragment are only partially supported!");
-        }
-    }
-
-    /**
      * Check the required bundle execution environment against the framework provided
      * exectution environment.
      * @param bundleEnvironment The required execution environment string
diff --git a/framework/src/main/java/org/apache/felix/framework/util/manifestparser/ManifestParser.java b/framework/src/main/java/org/apache/felix/framework/util/manifestparser/ManifestParser.java
index cceeae4..3c6425d 100644
--- a/framework/src/main/java/org/apache/felix/framework/util/manifestparser/ManifestParser.java
+++ b/framework/src/main/java/org/apache/felix/framework/util/manifestparser/ManifestParser.java
@@ -97,6 +97,7 @@
             (String) headerMap.get(Constants.FRAGMENT_HOST));
         if (clauses.length > 0)
         {
+            validateFragment(headerMap);
             try
             {
                 reqList.add(
@@ -239,6 +240,27 @@
         }
     }
 
+    /**
+     * Checks whether a fragment uses features that we do not currently support
+     * (e.g., Import-Package, Export-Package, and Bundle-NativeCode). If so, we
+     * throw an exception.
+     * @param headerMap the header to validate.
+    **/
+    private void validateFragment(Map headerMap) throws BundleException
+    {
+        String fragmentHost = (String) headerMap.get(Constants.FRAGMENT_HOST);
+        if (fragmentHost != null)
+        {
+            if ((headerMap.get(Constants.IMPORT_PACKAGE) != null)
+                || (headerMap.get(Constants.EXPORT_PACKAGE) != null)
+                || (headerMap.get(Constants.BUNDLE_NATIVECODE) != null))
+            {
+                throw new BundleException(
+                    "Fragments with exports, imports, or native code are not currently supported.");
+            }
+        }
+    }
+
     public String getManifestVersion()
     {
         String manifestVersion = (String) m_headerMap.get(Constants.BUNDLE_MANIFESTVERSION);