diff --git a/README.md b/README.md
index 583a62e..4f4ca9b 100644
--- a/README.md
+++ b/README.md
@@ -228,6 +228,7 @@ For the formula:
       - name
       - operator
       - value
+      - join (optional)
       - formula (optional)
         - field
         + values
diff --git a/lib/search.js b/lib/search.js
index 77e5098..b11c731 100644
--- a/lib/search.js
+++ b/lib/search.js
@@ -15,6 +15,7 @@ this.Searcher = (function() {
     this.SEARCH_FILTER_NAME_KEY     = 'name';
     this.SEARCH_FILTER_OPERATOR_KEY = 'operator';
     this.SEARCH_FILTER_VALUE_KEY    = 'value';
+    this.SEARCH_FILTER_JOIN_KEY     = 'join';
     this.SEARCH_FILTER_FORMULA_KEY  = 'formula';
 
     this.SEARCH_COLUMN_NAME_KEY = 'name';
@@ -157,7 +158,9 @@ this.Searcher = (function() {
     name     = searchFilterData[this.SEARCH_FILTER_NAME_KEY];
     operator = searchFilterData[this.SEARCH_FILTER_OPERATOR_KEY];
     value    = searchFilterData[this.SEARCH_FILTER_VALUE_KEY];
-    filter = NetsuiteToolkit.searchFilter(name, null, operator, value);
+    join     = searchFilterData[this.SEARCH_FILTER_JOIN_KEY] || null;
+
+    filter = NetsuiteToolkit.searchFilter(name, join, operator, value);
     return filter;
   }