diff --git a/src/intel/compiler/brw_fs_combine_constants.cpp b/src/intel/compiler/brw_fs_combine_constants.cpp
index db7b14a8312..8d16be4c4bb 100644
--- a/src/intel/compiler/brw_fs_combine_constants.cpp
+++ b/src/intel/compiler/brw_fs_combine_constants.cpp
@@ -303,7 +303,7 @@ needs_negate(const struct fs_reg *reg, const struct imm *imm)
    case BRW_REGISTER_TYPE_HF:
       return (reg->d & 0x8000u) != (imm->w & 0x8000u);
    case BRW_REGISTER_TYPE_W:
-      return ((reg->d & 0xffffu) < 0) != (imm->w < 0);
+      return ((int16_t)reg->d < 0) != (imm->w < 0);
    case BRW_REGISTER_TYPE_UQ:
    case BRW_REGISTER_TYPE_UD:
    case BRW_REGISTER_TYPE_UW: