diff --git a/core/src/cz/nic/tablexia/screen/createuser/FormScreen.java b/core/src/cz/nic/tablexia/screen/createuser/FormScreen.java
index dcb24f56c80570dccbe8de0357f5f509b16369bc..e1d4de13644544cf40e32f3c851bce944beb98ff 100644
--- a/core/src/cz/nic/tablexia/screen/createuser/FormScreen.java
+++ b/core/src/cz/nic/tablexia/screen/createuser/FormScreen.java
@@ -362,7 +362,7 @@ public class FormScreen extends AbstractTablexiaScreen<Void> {
             return false;
         }
 
-		setValid(FormValidationEnum.NAME, nameField.getText() != null && !nameField.getText().isEmpty());
+		setValid(FormValidationEnum.NAME, nameField.getText() != null && !nameField.getText().isEmpty() && nameField.getText().replace(" ","").length()>0);
         if (isValid(FormValidationEnum.NAME) == false) {
             displayHintDialog(FormValidationEnum.NAME, nameField);
             playValidationSound(VALIDATION_USERNAME_SOUND);