diff --git a/liblava/block/render_pass.hpp b/liblava/block/render_pass.hpp
index b7c825db40532df160301242632287087ec453cb..76e6cee01e8be2ff4aecf203cce70f0aff855987 100644
--- a/liblava/block/render_pass.hpp
+++ b/liblava/block/render_pass.hpp
@@ -19,7 +19,7 @@ namespace lava {
         bool create(VkAttachmentsRef target_attachments, rect area);
         void destroy();
 
-        void process(VkCommandBuffer cmd_buf, index frame);
+        void process(VkCommandBuffer cmd_buf, index frame = 0);
 
         device_ptr get_device() {
             return device;