diff --git a/include/mysql/plugin.h b/include/mysql/plugin.h
index 835e691daf3..ad3427a3ab5 100644
--- a/include/mysql/plugin.h
+++ b/include/mysql/plugin.h
@@ -455,7 +455,7 @@ struct st_maria_plugin
   struct st_mysql_show_var *status_vars;
   struct st_mysql_sys_var **system_vars;
   const char *version_info;  /* plugin version string */
-  int maturity;              /* MariaDB_PLUGIN_MATURITY_XXX */
+  unsigned int maturity; /* MariaDB_PLUGIN_MATURITY_XXX */
 };
 
 /*************************************************************************
diff --git a/include/mysql/plugin_auth.h.pp b/include/mysql/plugin_auth.h.pp
index 7db3dbb4715..977c87493a4 100644
--- a/include/mysql/plugin_auth.h.pp
+++ b/include/mysql/plugin_auth.h.pp
@@ -91,7 +91,7 @@ struct st_maria_plugin
   struct st_mysql_show_var *status_vars;
   struct st_mysql_sys_var **system_vars;
   const char *version_info;
-  int maturity;
+  unsigned int maturity;
 };
 enum enum_ftparser_mode
 {