1 files changed, 1 insertions, 0 deletions
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 850033b185f..8023a78dc27 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -224,6 +224,7 @@ enum ir_variable_mode {
    ir_var_in,
    ir_var_out,
    ir_var_inout,
+   ir_var_system_value, /**< Ex: front-face, instance-id, etc. */
    ir_var_temporary	/**< Temporary variable generated during compilation. */
 };