diff --git a/src/core_modules/command_spec/types.py b/src/core_modules/command_spec/types.py
index c39128dd..0baa13e8 100644
--- a/src/core_modules/command_spec/types.py
+++ b/src/core_modules/command_spec/types.py
@@ -1,4 +1,5 @@
 from src.utils.parse import SpecTypeError
+from src.utils.irc import hostmask_match, hostmask_parse
 
 TYPES = {}
 def _type(func):
@@ -70,6 +71,19 @@ def nuser(server, channel, user, args):
     _assert_args(args, "user")
     return server.get_user(args[0], create=True), 1
 
+@_type
+def cmask(server, channel, user, args):
+    _assert_args(args, "mask")
+    hostmask_obj = hostmask_parse(args[0])
+    users = []
+    for user in channel.users:
+        if hostmask_match(user.hostmask(), hostmask_obj):
+            users.append(user)
+    if users:
+        return users, 1
+    else:
+        raise SpecTypeError("No users found")
+
 @_type
 def lstring(server, channel, user, args):
     if args: