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-rw-r--r--tools/testing/selftests/bpf/trace_helpers.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c
index e7a19b04d4ea..7b7f918eda77 100644
--- a/tools/testing/selftests/bpf/trace_helpers.c
+++ b/tools/testing/selftests/bpf/trace_helpers.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>