diff --git a/sapi/apache2filter/sapi_apache2.c b/sapi/apache2filter/sapi_apache2.c
index 0df31c78b9e..08f413cd3ca 100644
--- a/sapi/apache2filter/sapi_apache2.c
+++ b/sapi/apache2filter/sapi_apache2.c
@@ -229,6 +229,7 @@ php_apache_sapi_flush(void *server_context)
 	apr_bucket_alloc_t *ba;
 	apr_bucket *b;
 	ap_filter_t *f; /* output filters */
+	TSRMLS_FETCH();
 
 	ctx = server_context;