diff --git a/src/assets/netteForms.js b/src/assets/netteForms.js
index cb691b61b..199c973e6 100644
--- a/src/assets/netteForms.js
+++ b/src/assets/netteForms.js
@@ -171,8 +171,10 @@ Nette.validateControl = function(elem, rules, onlyCheck, value, emptyOptional) {
 		}
 	}
 
-	if (!onlyCheck && elem.type === 'number' && !elem.validity.valid) {
-		Nette.addError(elem, 'Please enter a valid value.');
+	if (elem.type === 'number' && !elem.validity.valid) {
+		if (!onlyCheck) {
+			Nette.addError(elem, 'Please enter a valid value.');
+		}
 		return false;
 	}