diff --git a/src/intel/compiler/brw/brw_from_nir.cpp b/src/intel/compiler/brw/brw_from_nir.cpp
index b1f94adb98d..1fab317ed03 100644
--- a/src/intel/compiler/brw/brw_from_nir.cpp
+++ b/src/intel/compiler/brw/brw_from_nir.cpp
@@ -4330,7 +4330,7 @@ brw_from_nir_emit_cs_intrinsic(nir_to_brw_state &ntb,
           */
          const unsigned num_components = nir_src_num_components(nsrc);
          const unsigned bit_size = nir_src_bit_size(nsrc);
-         const nir_const_value *nval = nir_src_as_const_value(instr->src[0]);
+         const nir_const_value *nval = nir_src_as_const_value(nsrc);
 
          assert(bit_size <= 32);
          for (unsigned j = 1; j < num_components; j++)