diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 7bce735499..9525cfb32c 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -338,7 +338,8 @@ function get_option( $option, $default = false ) {
 			// Has to be get_row instead of get_var because of funkiness with 0, false, null values
 			if ( is_object( $row ) ) {
 				$value = $row->option_value;
-				wp_cache_add( $option, $value, 'options' );
+				if ( ! defined( 'WP_INSTALLING' ) )
+					wp_cache_add( $option, $value, 'options' );
 			} else { // option does not exist, so we must cache its non-existence
 				$notoptions[$option] = true;
 				wp_cache_set( 'notoptions', $notoptions, 'options' );