diff --git a/esphome/components/store_yaml/__init__.py b/esphome/components/store_yaml/__init__.py
index 4f50fda037..eef07aa8fc 100644
--- a/esphome/components/store_yaml/__init__.py
+++ b/esphome/components/store_yaml/__init__.py
@@ -50,6 +50,7 @@ class BitWriter:
     def flush(self):
         if self.size > 0:
             b = (self.buff << (8 - self.size)) & 255
+            self.put_bits(b, 8)
 
 
 def compress(s):