diff --git a/lib/sql.js b/lib/sql.js
index e4479c19..65a0b098 100644
--- a/lib/sql.js
+++ b/lib/sql.js
@@ -1131,11 +1131,13 @@ SQLConnector.prototype._buildWhere = function(model, where) {
             branches.push(stmtForClause.sql);
           }
         }
-        stmt.merge({
-          sql: '(' + branches.join(' ' + key.toUpperCase() + ' ') + ')',
-          params: branchParams,
-        });
-        whereStmts.push(stmt);
+        if (branches.length > 0) {
+          stmt.merge({
+            sql: '(' + branches.join(' ' + key.toUpperCase() + ' ') + ')',
+            params: branchParams,
+          });
+          whereStmts.push(stmt);
+        }
         continue;
       }
       // The value is not an array, fall back to regular fields