diff --git a/lib/db/install.php b/lib/db/install.php
index dbbf77f00ff..551228b7b87 100644
--- a/lib/db/install.php
+++ b/lib/db/install.php
@@ -328,7 +328,7 @@ function xmldb_main_install() {
     set_config('jsrev', time());
 
     // No admin setting for this any more, GD is now required, remove in Moodle 2.6.
-    gdversion('gdversion', 2);
+    set_config('gdversion', 2);
 
     // Install licenses
     require_once($CFG->libdir . '/licenselib.php');