diff --git a/lib/datasource.js b/lib/datasource.js
index c19974bf5..a545da15f 100644
--- a/lib/datasource.js
+++ b/lib/datasource.js
@@ -831,6 +831,7 @@ DataSource.prototype.define = function defineClass(className, properties, settin
   settings = settings || {};
 
   if (this.isRelational()) {
+    settings.strict = true;
     // Set the strict mode to be true for relational DBs by default
     if (settings.strict === undefined || settings.strict === null) {
       settings.strict = true;