diff --git a/src/gallium/drivers/r600/sfn/sfn_instr_mem.cpp b/src/gallium/drivers/r600/sfn/sfn_instr_mem.cpp
index a19d3632caa..8a484fcfe21 100644
--- a/src/gallium/drivers/r600/sfn/sfn_instr_mem.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_instr_mem.cpp
@@ -915,7 +915,8 @@ RatInstr::emit_image_size(nir_intrinsic_instr *intrin, Shader& shader)
          shader.set_flag(Shader::sh_txs_cube_array_comp);
 
          if (const_offset) {
-            unsigned lookup_resid = const_offset[0].u32 + shader.image_size_const_offset();
+            unsigned lookup_resid = (res_id - R600_IMAGE_REAL_RESOURCE_OFFSET) +
+                                    shader.image_size_const_offset();
             shader.emit_instruction(
                new AluInstr(op1_mov,
                             dest[2],