diff --git a/module/Vendor/SimpleSocket/include/SimpleSocket.h b/module/Vendor/SimpleSocket/include/SimpleSocket.h
index 80f27f20..fc2716b8 100644
--- a/module/Vendor/SimpleSocket/include/SimpleSocket.h
+++ b/module/Vendor/SimpleSocket/include/SimpleSocket.h
@@ -45,10 +45,6 @@
 #include "HostConf.h"
 #include "StatTimer.h"
 
-#ifdef _LINUX
-    #define _DEFAULT_SOURCE
-#endif
-
 #include <sys/stat.h>
 #include <cstdlib>
 #include <cstdio>
diff --git a/module/Vendor/SimpleSocket/include/StatTimer.h b/module/Vendor/SimpleSocket/include/StatTimer.h
index c9d4be34..7624d1c7 100644
--- a/module/Vendor/SimpleSocket/include/StatTimer.h
+++ b/module/Vendor/SimpleSocket/include/StatTimer.h
@@ -50,7 +50,6 @@
 #endif
 
 #ifdef _LINUX
-    #define _DEFAULT_SOURCE
   #include <stdio.h>
   #include <sys/time.h>
 #endif