diff --git a/rs/java/android/renderscript/FieldPacker.java b/rs/java/android/renderscript/FieldPacker.java
index 723ab24..0e57232 100644
--- a/rs/java/android/renderscript/FieldPacker.java
+++ b/rs/java/android/renderscript/FieldPacker.java
@@ -231,10 +231,18 @@
 
     public void addObj(BaseObj obj) {
         if (obj != null) {
-            // FIXME: this is fine for 32-bit but needs a path for 64-bit
-            addI32((int)obj.getID(null));
+            if (RenderScript.sPointerSize == 8) {
+                addI64(obj.getID(null));
+            }
+            else {
+                addI32((int)obj.getID(null));
+            }
         } else {
-            addI32(0);
+            if (RenderScript.sPointerSize == 8) {
+                addI64(0);
+            } else {
+                addI32(0);
+            }
         }
     }
 
diff --git a/rs/java/android/renderscript/RenderScript.java b/rs/java/android/renderscript/RenderScript.java
index 2222d2c..8cac22d 100644
--- a/rs/java/android/renderscript/RenderScript.java
+++ b/rs/java/android/renderscript/RenderScript.java
@@ -82,6 +82,12 @@
     */
     public static final long CREATE_FLAG_LOW_POWER = 0x0004;
 
+    /*
+     * Detect the bitness of the VM to allow FieldPacker to do the right thing.
+     */
+    static native int rsnSystemGetPointerSize();
+    static int sPointerSize;
+
     static {
         sInitialized = false;
         if (!SystemProperties.getBoolean("config.disable_renderscript", false)) {
@@ -99,6 +105,7 @@
                 System.loadLibrary("rs_jni");
                 _nInit();
                 sInitialized = true;
+                sPointerSize = rsnSystemGetPointerSize();
             } catch (UnsatisfiedLinkError e) {
                 Log.e(LOG_TAG, "Error loading RS jni library: " + e);
                 throw new RSRuntimeException("Error loading RS jni library: " + e);
diff --git a/rs/java/android/renderscript/ScriptC.java b/rs/java/android/renderscript/ScriptC.java
index 9e76f52..3176e28 100644
--- a/rs/java/android/renderscript/ScriptC.java
+++ b/rs/java/android/renderscript/ScriptC.java
@@ -67,6 +67,26 @@
     }
 
     /**
+     * Only intended for use by the generated derived classes.
+     *
+     * @param rs
+     * @hide
+     */
+    protected ScriptC(RenderScript rs, String resName, byte[] bitcode32, byte[] bitcode64) {
+        super(0, rs);
+        long id = 0;
+        if (RenderScript.sPointerSize == 4) {
+            id = internalStringCreate(rs, resName, bitcode32);
+        } else {
+            id = internalStringCreate(rs, resName, bitcode64);
+        }
+        if (id == 0) {
+            throw new RSRuntimeException("Loading of ScriptC script failed.");
+        }
+        setID(id);
+    }
+
+    /**
      * Name of the file that holds the object cache.
      */
     private static final String CACHE_PATH = "com.android.renderscript.cache";
@@ -113,4 +133,17 @@
         //        Log.v(TAG, "Create script for resource = " + resName);
         return rs.nScriptCCreate(resName, mCachePath, pgm, pgmLength);
     }
+
+    private static synchronized long internalStringCreate(RenderScript rs, String resName, byte[] bitcode) {
+        // Create the RS cache path if we haven't done so already.
+        if (mCachePath == null) {
+            File f = new File(rs.mCacheDir, CACHE_PATH);
+            mCachePath = f.getAbsolutePath();
+            f.mkdirs();
+        }
+        //        Log.v(TAG, "Create script for resource = " + resName);
+        return rs.nScriptCCreate(resName, mCachePath, bitcode, bitcode.length);
+    }
+
+
 }