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-rw-r--r--scripts/kconfig/lexer.l2
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/kconfig/lexer.l b/scripts/kconfig/lexer.l
index 89544c3a1a29..9c2cdfc33c6f 100644
--- a/scripts/kconfig/lexer.l
+++ b/scripts/kconfig/lexer.l
@@ -13,6 +13,7 @@
#include <stdlib.h>
#include <string.h>
+#include <xalloc.h>
#include "lkc.h"
#include "preprocess.h"
@@ -120,7 +121,6 @@ n [A-Za-z0-9_-]
"menuconfig" return T_MENUCONFIG;
"modules" return T_MODULES;
"on" return T_ON;
-"optional" return T_OPTIONAL;
"prompt" return T_PROMPT;
"range" return T_RANGE;
"select" return T_SELECT;