diff --git a/homeassistant/components/tts/__init__.py b/homeassistant/components/tts/__init__.py
index b7d3b4f1f4c..6dc2e9b7d45 100644
--- a/homeassistant/components/tts/__init__.py
+++ b/homeassistant/components/tts/__init__.py
@@ -399,7 +399,7 @@ class SpeechManager:
         @callback
         def async_remove_from_mem():
             """Cleanup memcache."""
-            self.mem_cache.pop(key)
+            self.mem_cache.pop(key, None)
 
         self.hass.loop.call_later(self.time_memory, async_remove_from_mem)