diff --git a/src/api/java/Context.java b/src/api/java/Context.java
index 691ecd737..d2e26334b 100644
--- a/src/api/java/Context.java
+++ b/src/api/java/Context.java
@@ -2226,6 +2226,15 @@ public class Context implements AutoCloseable {
         return (IntExpr)Expr.create(this, Native.mkSeqIndex(nCtx(), s.getNativeObject(), substr.getNativeObject(), offset.getNativeObject()));
     }
 
+    /**
+     * Extract the last index of sub-string.
+     */
+    public final <R extends Sort> IntExpr mkLastIndexOf(Expr<SeqSort<R>> s, Expr<SeqSort<R>> substr)
+    {
+        checkContextMatch(s, substr);
+        return (IntExpr)Expr.create(this, Native.mkSeqLastIndex(nCtx(), s.getNativeObject(), substr.getNativeObject()));
+    }
+
     /**
      * Replace the first occurrence of src by dst in s.
      */
diff --git a/src/api/java/Sort.java b/src/api/java/Sort.java
index f612b9031..4910338f3 100644
--- a/src/api/java/Sort.java
+++ b/src/api/java/Sort.java
@@ -144,6 +144,8 @@ public class Sort extends AST
             return new SeqSort<>(ctx, obj);
         case Z3_RE_SORT:
             return new ReSort<>(ctx, obj);
+        case Z3_CHAR_SORT:
+            return new CharSort(ctx, obj);
         default:
             throw new Z3Exception("Unknown sort kind");
         }