Add include guards in header files.

1 files changed, 4 insertions, 0 deletions

diff --git a/utils.h b/utils.h
index a5f8b54..d19c3ae 100644
--- a/utils.h
+++ b/utils.h
@@ -18,6 +18,9 @@
  *
  */
 
+#ifndef UTILS_H
+#define UTILS_H
+
 /* For uint64_t */
 #include <stdint.h>
 /* For ssize_t */
@@ -85,3 +88,4 @@ struct passwd *xgetpwnam(const char *name);
 /* Caching version of getpwuid */
 struct passwd *xgetpwuid(uid_t uid);
 
+#endif /* UTILS_H */