diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index ba4b90cb59..01b7ee1eed 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -379,5 +379,6 @@
 	"The entry does not have stickers": "La entrada no tiene etiquetas",
 	"Too many records": "Demasiados registros",
 	"This buyer has already made a reservation for this date": "Este comprador ya ha hecho una reserva para esta fecha",
-	"No valid travel thermograph found": "No se encontró un termógrafo válido"
-}
+	"No valid travel thermograph found": "No se encontró un termógrafo válido",
+	"type cannot be blank": "Se debe rellenar el tipo"
+}
\ No newline at end of file
diff --git a/modules/client/back/models/client-observation.js b/modules/client/back/models/client-observation.js
index e34eedca9a..d022a440a8 100644
--- a/modules/client/back/models/client-observation.js
+++ b/modules/client/back/models/client-observation.js
@@ -1,8 +1,11 @@
 module.exports = function(Self) {
-    Self.validate('text', isEnabled, {message: 'Description cannot be blank'});
-    function isEnabled(err) {
+    Self.validate('text', function(err) {
         if (!this.text) err();
-    }
+    }, {message: 'Description cannot be blank'});
+
+    Self.validate('observationTypeFk', function(err) {
+        if (!this.observationTypeFk) err();
+    }, {message: 'type cannot be blank'});
 
     Self.observe('before save', function(ctx, next) {
         ctx.instance.created = Date();