diff --git a/scripts/kconfig/lxdialog/dialog.h b/scripts/kconfig/lxdialog/dialog.h
index 8dea47f..fd695e1 100644
--- a/scripts/kconfig/lxdialog/dialog.h
+++ b/scripts/kconfig/lxdialog/dialog.h
@@ -24,6 +24,7 @@
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdbool.h>
 
 #ifdef __sun__
 #define CURS_MACROS