diff --git a/src/intel/compiler/brw/brw_inst.cpp b/src/intel/compiler/brw/brw_inst.cpp
index f76110a46a0..19a7b087ea6 100644
--- a/src/intel/compiler/brw/brw_inst.cpp
+++ b/src/intel/compiler/brw/brw_inst.cpp
@@ -707,7 +707,8 @@ brw_inst::flags_read(const intel_device_info *devinfo) const
    } else {
       unsigned mask = 0;
       for (int i = 0; i < sources; i++) {
-         mask |= brw_flag_mask(src[i], size_read(devinfo, i));
+         if (src[i].file == ARF)
+            mask |= brw_flag_mask(src[i], size_read(devinfo, i));
       }
       return mask;
    }