diff --git a/WebApplication/AdminCategories.aspx.cs b/WebApplication/AdminCategories.aspx.cs
index fe65aec..197db1f 100644
--- a/WebApplication/AdminCategories.aspx.cs
+++ b/WebApplication/AdminCategories.aspx.cs
@@ -47,6 +47,7 @@ namespace ScrewTurn.Wiki {
 			lblNewCategoryResult.CssClass = "";
 			lblNewCategoryResult.Text = "";
 
+			Page.Validate("newcat");
 			if(!Page.IsValid) return;
 
 			txtNewCategory.Text = txtNewCategory.Text.Trim();
diff --git a/WebApplication/Edit.aspx.cs b/WebApplication/Edit.aspx.cs
index 0315ebc..da048ac 100644
--- a/WebApplication/Edit.aspx.cs
+++ b/WebApplication/Edit.aspx.cs
@@ -699,6 +699,9 @@ namespace ScrewTurn.Wiki {
 				lblCategoryResult.Text = "";
 				lblCategoryResult.CssClass = "";
 
+				Page.Validate("category");
+				if(!Page.IsValid) return;
+
 				string fullName = NameTools.GetFullName(DetectNamespace(), txtCategory.Text);
 				Pages.CreateCategory(DetectNamespaceInfo(), txtCategory.Text, FindAppropriateProvider());