diff --git a/lib/sql.js b/lib/sql.js
index f1bb9a0..ceb94dc 100644
--- a/lib/sql.js
+++ b/lib/sql.js
@@ -1047,6 +1047,12 @@ SQLConnector.prototype.buildSelect = function(model, filter, options) {
   return this.parameterize(selectStmt);
 };
 
+/**
+ * Build the SQL INNER JOIN clauses
+ * @param {string} model Model name
+ * @param {object} where An object for the where conditions
+ * @returns {ParameterizedSQL} The SQL INNER JOIN clauses
+ */
 SQLConnector.prototype.buildJoins = function(model, where) {
   var modelDef = this.getModelDefinition(model);
   var relations = modelDef.model.relations;