diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index e199d9697dc..b5c23c99588 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -691,7 +691,7 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
 
       dest = get_nir_dest(instr->dest);
 
-      src = src_reg(dst_reg(UNIFORM, instr->const_index[0] / 16));
+      src = src_reg(dst_reg(UNIFORM, nir_intrinsic_base(instr) / 16));
       src.type = dest.type;
 
       /* Uniforms don't actually have to be vec4 aligned.  In the case that