diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index 7e09020c5b3..938362eb7ff 100644
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -1771,9 +1771,9 @@ fs_visitor::convert_attr_sources_to_hw_regs(fs_inst *inst)
 {
    for (int i = 0; i < inst->sources; i++) {
       if (inst->src[i].file == ATTR) {
+         assert(inst->src[i].nr == 0);
          int grf = payload().num_regs +
                    prog_data->curb_read_length +
-                   inst->src[i].nr +
                    inst->src[i].offset / REG_SIZE;
 
          /* As explained at brw_reg_from_fs_reg, From the Haswell PRM: