diff --git a/telethon/client/chats.py b/telethon/client/chats.py
index b310652d..cb5263fb 100644
--- a/telethon/client/chats.py
+++ b/telethon/client/chats.py
@@ -37,7 +37,7 @@ class _ParticipantsIter(RequestIter):
                 functions.channels.GetFullChannelRequest(entity)
             )).full_chat.participants_count
 
-            if self.limit == 0:
+            if self.limit <= 0:
                 raise StopAsyncIteration
 
             self.seen = set()
diff --git a/telethon/client/dialogs.py b/telethon/client/dialogs.py
index 75fbf255..f9782f4d 100644
--- a/telethon/client/dialogs.py
+++ b/telethon/client/dialogs.py
@@ -18,7 +18,7 @@ class _DialogsIter(RequestIter):
             hash=0
         )
 
-        if self.limit == 0:
+        if self.limit <= 0:
             # Special case, get a single dialog and determine count
             dialogs = await self.client(self.request)
             self.total = getattr(dialogs, 'count', len(dialogs.dialogs))
diff --git a/telethon/client/messages.py b/telethon/client/messages.py
index c14bddeb..d59236d9 100644
--- a/telethon/client/messages.py
+++ b/telethon/client/messages.py
@@ -111,7 +111,7 @@ class _MessagesIter(RequestIter):
                 hash=0
             )
 
-        if self.limit == 0:
+        if self.limit <= 0:
             # No messages, but we still need to know the total message count
             result = await self.client(self.request)
             if isinstance(result, types.messages.MessagesNotModified):