diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c4e36b4..5afd9a6 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -32,6 +32,8 @@
 #include "util/dump-insn.h"
 #include <inttypes.h>
 
+#include "sane_ctype.h"
+
 static char const		*script_name;
 static char const		*generate_script_lang;
 static bool			debug_mode;