diff --git a/bp-core/bp-core-wpabstraction.php b/bp-core/bp-core-wpabstraction.php
index d831b62..18a3c23 100644
--- a/bp-core/bp-core-wpabstraction.php
+++ b/bp-core/bp-core-wpabstraction.php
@@ -44,6 +44,15 @@ if ( !is_multisite() ) {
 		}
 	}
 
+	if ( ! function_exists( 'add_blog_option' ) ) {
+		/**
+		 * @see add_blog_option()
+		 */
+		function add_blog_option( $blog_id, $option_name, $option_value ) {
+			return add_option( $option_name, $option_value );
+		}
+	}
+
 	if ( !function_exists( 'update_blog_option' ) ) {
 		/**
 		 * @see update_blog_option()