diff --git a/db/db_ut.h b/db/db_ut.h
index c3f29fe6c4..ea099fddbc 100644
--- a/db/db_ut.h
+++ b/db/db_ut.h
@@ -62,6 +62,10 @@
 
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
+/**
+ * _BSD_SOURCE has been replaced with the _DEFAULT_SOURCE macro
+ */
+#define _DEFAULT_SOURCE 1
 #endif
 
 #include <time.h>