Index: contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicAnalyzer.java
===================================================================
--- contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicAnalyzer.java	(revision 797160)
+++ contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicAnalyzer.java	(working copy)
@@ -36,10 +36,9 @@
  * <p>
  * This analyzer implements light-stemming as specified by:
  * <i>
- * Improving Stemming for Arabic Information Retrieval: 
- *      Light Stemming and Co-occurrence Analysis
+ * Light Stemming for Arabic Information Retrieval
  * </i>    
- * http://ciir.cs.umass.edu/pubfiles/ir-249.pdf
+ * http://www.mtholyoke.edu/~lballest/Pubs/arab_stem05.pdf
  * <p>
  * The analysis package contains three primary components:
  * <ul>
Index: contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicStemmer.java
===================================================================
--- contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicStemmer.java	(revision 797160)
+++ contrib/analyzers/common/src/java/org/apache/lucene/analysis/ar/ArabicStemmer.java	(working copy)
@@ -43,6 +43,7 @@
   
   public static final char prefixes[][] = {
       ("" + ALEF + LAM).toCharArray(), 
+      ("" + LAM + LAM).toCharArray(),
       ("" + WAW + ALEF + LAM).toCharArray(), 
       ("" + BEH + ALEF + LAM).toCharArray(),
       ("" + KAF + ALEF + LAM).toCharArray(),
Index: contrib/analyzers/common/src/test/org/apache/lucene/analysis/ar/TestArabicStemFilter.java
===================================================================
--- contrib/analyzers/common/src/test/org/apache/lucene/analysis/ar/TestArabicStemFilter.java	(revision 797160)
+++ contrib/analyzers/common/src/test/org/apache/lucene/analysis/ar/TestArabicStemFilter.java	(working copy)
@@ -39,6 +39,9 @@
     check("الحسن", "حسن");
   }    
 
+  public void testLlPrefix() throws IOException {
+    check("للاخر", "اخر");
+  }
   public void testWalPrefix() throws IOException {
     check("والحسن", "حسن");
   }