diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 073e6635e9f..d81c04ad2aa 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -207,10 +207,13 @@ typedef enum {
    nir_var_read_only_modes = nir_var_shader_in | nir_var_uniform |
                              nir_var_system_value | nir_var_mem_constant |
                              nir_var_mem_ubo,
-   /** Modes where vector derefs can be indexed as arrays */
+   /* Modes where vector derefs can be indexed as arrays. nir_var_shader_out is only for mesh
+    * stages.
+    */
    nir_var_vec_indexable_modes = nir_var_mem_ubo | nir_var_mem_ssbo |
                                  nir_var_mem_shared | nir_var_mem_global |
-                                 nir_var_mem_push_const,
+                                 nir_var_mem_push_const | nir_var_mem_task_payload |
+                                 nir_var_shader_out,
    nir_num_variable_modes  = 16,
    nir_var_all             = (1 << nir_num_variable_modes) - 1,
 } nir_variable_mode;