diff --git a/src/osd/osd_peering_pg_test.cpp b/src/osd/osd_peering_pg_test.cpp
index 184094b4..054fdba3 100644
--- a/src/osd/osd_peering_pg_test.cpp
+++ b/src/osd/osd_peering_pg_test.cpp
@@ -1,7 +1,9 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 
+#ifndef _LARGEFILE64_SOURCE
 #define _LARGEFILE64_SOURCE
+#endif
 
 #include "malloc_or_die.h"
 #include "osd_peering_pg.h"
diff --git a/src/test/test_shit.cpp b/src/test/test_shit.cpp
index 0a03be25..4eeab4fc 100644
--- a/src/test/test_shit.cpp
+++ b/src/test/test_shit.cpp
@@ -1,7 +1,10 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)
 
+#ifndef _LARGEFILE64_SOURCE
 #define _LARGEFILE64_SOURCE
+#endif
+
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>