diff --git a/defaults/main.yml b/defaults/main.yml
index 62ba89a..bf30bfd 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -62,7 +62,7 @@ mysql_syslog_tag: 'mysql'
 # Extra configuration
 # -------------------------------------
 #
-mysql_extra_configuration: []
+mysql_extra_configuration: {}
 
 # Example:
 #mysql_extra_configuration: