diff --git a/ChangeLog.txt b/ChangeLog.txt
index aeea720d..9bbe3d3a 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,3 +1,10 @@
+1.5.2 - 201809xx
+================
+
+Broker:
+- Fix build when using WITH_ADNS=yes.
+
+
 1.5.1 - 20180816
 ================
 
diff --git a/src/loop.c b/src/loop.c
index d1bec53e..5493fffc 100644
--- a/src/loop.c
+++ b/src/loop.c
@@ -17,6 +17,10 @@ Contributors:
 
 #include "config.h"
 
+#ifndef WIN32
+#  define _GNU_SOURCE
+#endif
+
 #include <assert.h>
 #ifndef WIN32
 #ifdef WITH_EPOLL