diff --git a/contrib/src/net/email.cpp b/contrib/src/net/email.cpp
index 7f314927fc..8fe6fa98f9 100644
--- a/contrib/src/net/email.cpp
+++ b/contrib/src/net/email.cpp
@@ -36,7 +36,7 @@
 #include "wx/timer.h"
 #include "wx/wfstream.h"
 #include "stdlib.h"
-#include "process.h"
+#include "unistd.h"
 #endif
 
 // Send a message.