diff --git a/src/gallium/auxiliary/tgsi/tgsi_util.c b/src/gallium/auxiliary/tgsi/tgsi_util.c
index d572ff0..47e632d 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_util.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_util.c
@@ -106,7 +106,7 @@ tgsi_util_set_src_register_swizzle(
 unsigned
 tgsi_util_get_full_src_register_sign_mode(
    const struct  tgsi_full_src_register *reg,
-   unsigned component )
+   UNUSED unsigned component )
 {
    unsigned sign_mode;