diff --git a/src/structures.h b/src/structures.h
index 11eb9ab..d31e2e1 100644
--- a/src/structures.h
+++ b/src/structures.h
@@ -16,7 +16,7 @@
 #include <sys/stat.h>
 #include <stdint.h>
 #ifndef PRINTF_INT64_MODIFIER
-#define PRINTF_INT64_MODIFIER "ll"
+#define PRINTF_INT64_MODIFIER "PRIu64"
 #endif
 #ifdef  __cplusplus
 extern "C" {