diff --git a/modules/line_handler.py b/modules/line_handler.py
index 5554183d..0033ea4f 100644
--- a/modules/line_handler.py
+++ b/modules/line_handler.py
@@ -80,7 +80,8 @@ class Module(ModuleManager.BaseModule):
                 isupport[key] = None
         event["server"].isupport.update(isupport)
 
-        if "NAMESX" in isupport:
+        if "NAMESX" in isupport and not "multi-prefix" in event[
+                "server"].capabilities:
             event["server"].send("PROTOCTL NAMESX")
 
         if "PREFIX" in isupport: