diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index e61b4b3..7caba70 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -48,6 +48,8 @@
 #include "probe-file.h"
 #include "session.h"
 
+#include "sane_ctype.h"
+
 #define PERFPROBE_GROUP "probe"
 
 bool probe_event_dry_run;	/* Dry run flag */