Index: bp-core/bp-core-wpabstraction.php
===================================================================
--- bp-core/bp-core-wpabstraction.php	(revision 2736)
+++ bp-core/bp-core-wpabstraction.php	(working copy)
@@ -49,6 +49,12 @@
 	}
 }
 
+if ( !function_exists( 'delete_blog_option' ) ) {
+	function delete_blog_option( $blog_id, $option_name ) {
+		return delete_option( $option_name );
+	}
+}
+
 if ( !function_exists( 'switch_to_blog' ) ) {
 	function switch_to_blog() {
 		return 1;