diff --git a/Builder/IISMainHandler/build.txt b/Builder/IISMainHandler/build.txt
index 90064a9..c5befbc 100644
--- a/Builder/IISMainHandler/build.txt
+++ b/Builder/IISMainHandler/build.txt
@@ -1 +1 @@
-854
\ No newline at end of file
+856
\ No newline at end of file
diff --git a/Common/dataobjects/Board.cs b/Common/dataobjects/Board.cs
index 08abe09..8c9e5ea 100644
--- a/Common/dataobjects/Board.cs
+++ b/Common/dataobjects/Board.cs
@@ -163,6 +163,7 @@ namespace FLocal.Common.dataobjects {
 						}
 					)
 					let board = Board.LoadById(id)
+					where board.sortOrder >= 0
 					orderby board.sortOrder, board.id
 					select board;
 			}
diff --git a/Common/dataobjects/Category.cs b/Common/dataobjects/Category.cs
index 5a07c9c..58f7587 100644
--- a/Common/dataobjects/Category.cs
+++ b/Common/dataobjects/Category.cs
@@ -90,6 +90,7 @@ namespace FLocal.Common.dataobjects {
 						}
 					)
 					let board = Board.LoadById(id)
+					where board.sortOrder >= 0
 					orderby board.sortOrder, board.id
 					select board;
 			}