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-rw-r--r--tools/testing/selftests/pid_namespace/pid_max.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c
index 51c414faabb0..96f274f0582b 100644
--- a/tools/testing/selftests/pid_namespace/pid_max.c
+++ b/tools/testing/selftests/pid_namespace/pid_max.c
@@ -10,6 +10,7 @@
#include <stdlib.h>
#include <string.h>
#include <syscall.h>
+#include <sys/mount.h>
#include <sys/wait.h>
#include "../kselftest_harness.h"