diff --git a/lib/auxlib.c b/lib/auxlib.c
index c514383d9..3eecdb206 100644
--- a/lib/auxlib.c
+++ b/lib/auxlib.c
@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <inttypes.h>
 #include "log.h"
 #include "loglib.h"