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-rw-r--r--include/exec_shell.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/exec_shell.h b/include/exec_shell.h
index a2aa757de..04aa089cc 100644
--- a/include/exec_shell.h
+++ b/include/exec_shell.h
@@ -1 +1,6 @@
-extern void __attribute__((__noreturn__)) exec_shell(void);
+#ifndef UTIL_LINUX_EXEC_SHELL_H
+#define UTIL_LINUX_EXEC_SHELL_H
+
+extern void exec_shell(void) __attribute__((__noreturn__));
+
+#endif /* UTIL_LINUX_EXEC_SHELL_H */