diff --git a/mos.yml b/mos.yml
index 88656bf..6300d4d 100644
--- a/mos.yml
+++ b/mos.yml
@@ -45,8 +45,8 @@ config_schema:
   - ["prometheus.pushgateway", "chbtl01.paphosting.net:9091"]
 
 
-#build_vars:
-#  FLASH_SIZE: 1048576
+build_vars:
+  FLASH_SIZE: 1048576
 
 # List of libraries used by this app, in order of initialisation
 libs: