diff --git a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
index a253c81c845..4f00b7f146f 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_register_coalesce.cpp
@@ -195,7 +195,7 @@ fs_visitor::register_coalesce()
             continue;
          }
          reg_to_offset[offset] = inst->dst.reg_offset;
-         if (inst->exec_size == 16)
+         if (inst->regs_written > 1)
             reg_to_offset[offset + 1] = inst->dst.reg_offset + 1;
          mov[offset] = inst;
          channels_remaining -= inst->regs_written;