diff --git a/davtelepot/__init__.py b/davtelepot/__init__.py
index ed52bc4..f1e2b45 100644
--- a/davtelepot/__init__.py
+++ b/davtelepot/__init__.py
@@ -11,7 +11,7 @@ __author__ = "Davide Testa"
 __email__ = "davide@davte.it"
 __credits__ = ["Marco Origlia", "Nick Lee @Nickoala"]
 __license__ = "GNU General Public License v3.0"
-__version__ = "2.9.3"
+__version__ = "2.9.4"
 __maintainer__ = "Davide Testa"
 __contact__ = "t.me/davte"
 
diff --git a/davtelepot/api.py b/davtelepot/api.py
index f17f5a5..fbbe5eb 100644
--- a/davtelepot/api.py
+++ b/davtelepot/api.py
@@ -1768,9 +1768,9 @@ class TelegramBot:
         No more than 50 results per query are allowed.
         See https://core.telegram.org/bots/api#answerinlinequery for details.
         """
-        if 'switch_pm_text' in kwargs:
+        if 'switch_pm_text' in kwargs and kwargs['switch_pm_text']:
             button = InlineQueryResultsButton(text=kwargs['switch_pm_text'])
-        if 'switch_pm_parameter' in kwargs:
+        if 'switch_pm_parameter' in kwargs and kwargs['switch_pm_parameter']:
             button = InlineQueryResultsButton(start_parameter=kwargs['switch_pm_parameter'])
         return await self.api_request(
             'answerInlineQuery',