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-rw-r--r--tools/perf/util/callchain.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index a47d0e8c2434..76bf05b26d3b 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -16,6 +16,7 @@
#include <stdbool.h>
#include <errno.h>
#include <math.h>
+#include <linux/string.h>
#include <linux/zalloc.h>
#include "asm/bug.h"