diff --git a/apps/opencs/view/world/idvalidator.cpp b/apps/opencs/view/world/idvalidator.cpp
index c685e44ee..7c210daae 100644
--- a/apps/opencs/view/world/idvalidator.cpp
+++ b/apps/opencs/view/world/idvalidator.cpp
@@ -20,7 +20,7 @@ QValidator::State CSVWorld::IdValidator::validate (QString& input, int& pos) con
 {
     if (mRelaxed)
     {
-        if (input.indexOf ('"')!=-1 || input.indexOf ("::")!=-1)
+        if (input.indexOf ('"')!=-1 || input.indexOf ("::")!=-1 || input.indexOf ("#")!=-1)
             return QValidator::Invalid;
     }
     else