diff --git a/lib/haxe/src/org/apache/thrift/helper/StringSet.hx b/lib/haxe/src/org/apache/thrift/helper/StringSet.hx
index d8c0d90..b47f868 100644
--- a/lib/haxe/src/org/apache/thrift/helper/StringSet.hx
+++ b/lib/haxe/src/org/apache/thrift/helper/StringSet.hx
@@ -89,7 +89,7 @@
         return ret;
     }
 
-    public function get_size() : String {
+    public function get_size() : Int {
         return _size;
     }
 }