diff --git a/tools/perf/trace/beauty/flock.c b/tools/perf/trace/beauty/flock.c
index 021bb48c6336..34b6348edb6e 100644
--- a/tools/perf/trace/beauty/flock.c
+++ b/tools/perf/trace/beauty/flock.c
@@ -1,3 +1,4 @@
+#include <fcntl.h>
 
 static size_t syscall_arg__scnprintf_flock(char *bf, size_t size,
 					   struct syscall_arg *arg)