diff --git a/src/gallium/auxiliary/draw/draw_private.h b/src/gallium/auxiliary/draw/draw_private.h
index 626a2e3e304..40a72c9dcfc 100644
--- a/src/gallium/auxiliary/draw/draw_private.h
+++ b/src/gallium/auxiliary/draw/draw_private.h
@@ -193,7 +193,7 @@ struct draw_context
 
       const float (*aligned_constants)[4];
 
-      float (*aligned_constant_storage)[4];
+      const float (*aligned_constant_storage)[4];
       unsigned const_storage_size;