diff --git a/src/add-category-dialog.vala b/src/add-category-dialog.vala
index 57110b2..9db03aa 100644
--- a/src/add-category-dialog.vala
+++ b/src/add-category-dialog.vala
@@ -11,30 +11,28 @@ public class AddCategoryDialog : Adw.MessageDialog {
 
         this.add_response ("cancel", _("Cancel"));
         this.add_response ("add", _("Add"));
- 	this.set_response_appearance ("add", Adw.ResponseAppearance.SUGGESTED);
+        this.set_response_appearance ("add", Adw.ResponseAppearance.SUGGESTED);
 
         this.set_response_enabled ("add", false);
- 	this.set_close_response ("cancel");
+ 	    this.set_close_response ("cancel");
 
-	var lb = new Gtk.ListBox () { css_classes = { "boxed-list" } };
-	name_entry = new Adw.EntryRow () {
-		input_hints = Gtk.InputHints.SPELLCHECK,
-		title = _("Category Name")
-	};
-	lb.append (name_entry);
+        var lb = new Gtk.ListBox () { css_classes = { "boxed-list" } };
+        name_entry = new Adw.EntryRow () {
+            input_hints = Gtk.InputHints.SPELLCHECK,
+            title = _("Category Name")
+        };
+        lb.append (name_entry);
 
-	percentage = new Gtk.Adjustment (0, 0, 100, 1, 10, 1);
-	var percent = new Adw.SpinRow (percentage, 1, 2) {
-		title = _("Category Percent")
-	};
-	lb.append (percent);
+        percentage = new Gtk.Adjustment (0, 0, 100, 1, 10, 0);
+        var percent = new Adw.SpinRow (percentage, 1, 2) {
+            title = _("Category Percent")
+        };
+        lb.append (percent);
 
-	this.set_extra_child (lb);
+	    this.set_extra_child (lb);
 
-        name_entry.changed.connect (() => {
-            this.set_response_enabled ("add", true);
-        });
+        name_entry.changed.connect (() => set_response_enabled ("add", name_entry.text.strip () != ""));
 
- 	this.present ();
+ 	    present ();
     }
 }