diff --git a/src/assets/netteForms.js b/src/assets/netteForms.js
index 172a4c29c..2dbe77b30 100644
--- a/src/assets/netteForms.js
+++ b/src/assets/netteForms.js
@@ -35,6 +35,7 @@
 
 	Nette.formErrors = [];
 	Nette.version = '3.0';
+	Nette.invalidNumberMessage = 'Please enter a valid value.';
 
 
 	/**
@@ -234,7 +235,7 @@
 
 			} else if (elem.type === 'number' && !elem.validity.valid) {
 				if (!onlyCheck) {
-					Nette.addError(elem, 'Please enter a valid value.');
+					Nette.addError(elem, Nette.invalidNumberMessage);
 				}
 			}
 		}