diff --git a/lib/migration.js b/lib/migration.js
index 1f83cd78..b2e68c72 100644
--- a/lib/migration.js
+++ b/lib/migration.js
@@ -335,15 +335,13 @@ function mixinMigration(PostgreSQL) {
         postgreType = prop.postgresql.dataType.toUpperCase();
       }
 
-      if (prop.generated) {
-        if (postgreType === 'UUID') {
-          self.execute('CREATE EXTENSION IF NOT EXISTS "uuid-ossp";', 
-            (err, fields) => {
-            if (err) {
-              return cb(err);
-            };
-          });
-        }
+      if (prop.generated && postgreType === 'UUID') {
+        self.execute('CREATE EXTENSION IF NOT EXISTS "uuid-ossp";', 
+          (err, fields) => {
+          if (err) {
+            return cb(err);
+          };
+        }); 
       }
     });
   }
@@ -356,7 +354,9 @@ function mixinMigration(PostgreSQL) {
   PostgreSQL.prototype.createTable = function(model, cb) {
     const self = this;
     const name = self.tableEscaped(model);
-    self.checksExtention(model);
+    self.checksExtention(model, (err)=>{
+      cb(err);
+    });
 
     // Please note IF NOT EXISTS is introduced in postgresql v9.3
     self.execute(