diff --git a/chapters/shaders.adoc b/chapters/shaders.adoc
index 6f2b7bda5f..11a1876ba1 100644
--- a/chapters/shaders.adoc
+++ b/chapters/shaders.adoc
@@ -3455,7 +3455,7 @@ flat in int vDrawID; // Passed through from vertex shader
 
 void main()
 {
-    uint local_draw_data = subgroupBroadcastFirst(draw_data[local_draw_data]);
+    uint local_draw_data = subgroupBroadcastFirst(draw_data[vDrawID]);
 }
 ----