diff --git a/simgear/io/sg_netChat.cxx b/simgear/io/sg_netChat.cxx
index 597bb47e..ee3c992a 100644
--- a/simgear/io/sg_netChat.cxx
+++ b/simgear/io/sg_netChat.cxx
@@ -26,7 +26,8 @@
 #include <simgear/io/sg_netChat.hxx>
 
 #include <cstring> // for strdup
-         
+#include <malloc.h>
+
 namespace  simgear {
 
 void