diff --git a/simgear/io/sg_netChat.cxx b/simgear/io/sg_netChat.cxx
index ee3c992a..f007e285 100644
--- a/simgear/io/sg_netChat.cxx
+++ b/simgear/io/sg_netChat.cxx
@@ -26,7 +26,7 @@
 #include <simgear/io/sg_netChat.hxx>
 
 #include <cstring> // for strdup
-#include <malloc.h>
+#include <cstdlib>
 
 namespace  simgear {