diff --git a/modules/alias/__init__.py b/modules/alias/__init__.py
index e3f30d2..3cf9c01 100644
--- a/modules/alias/__init__.py
+++ b/modules/alias/__init__.py
@@ -118,9 +118,9 @@ def treat_variables(res):
     return True
 
 def treat_alias(msg, hooks_cache):
-    if msg.cmd == "PRIVMSG" and (len(msg.cmds[0]) > 0 and
-        msg.cmds[0][1:] in DATAS.getNode("aliases").index and
-        msg.cmds[0][1:] not in hooks_cache("cmd_hook")):
+    if msg.cmd == "PRIVMSG" and (len(msg.cmds[0]) > 0 and msg.cmds[0][0] == "!"
+        and msg.cmds[0][1:] in DATAS.getNode("aliases").index
+        and msg.cmds[0][1:] not in hooks_cache("cmd_hook")):
         msg.content = msg.content.replace(msg.cmds[0],
                   DATAS.getNode("aliases").index[msg.cmds[0][1:]]["origin"], 1)