diff --git a/vulkan-rs/src/render_target/mod.rs b/vulkan-rs/src/render_target/mod.rs
index bda1675..5479232 100644
--- a/vulkan-rs/src/render_target/mod.rs
+++ b/vulkan-rs/src/render_target/mod.rs
@@ -342,6 +342,11 @@ impl RenderTarget {
     }
 
     pub fn end(&self, buffer_recorder: &mut CommandBufferRecorder<'_>) {
+        debug_assert_eq!(
+            self.current_subpass.load(SeqCst) as usize,
+            self.sub_passes.len() - 1
+        );
+
         buffer_recorder.end_render_pass();
     }
 }