diff --git a/src/ef/ef0100.cpp b/src/ef/ef0100.cpp
index 5bbcff8c7..3e70dde8d 100755
--- a/src/ef/ef0100.cpp
+++ b/src/ef/ef0100.cpp
@@ -1,3 +1,4 @@
+#include <automask.h>
 #include <relapp.h>
 
 #include "../ve/velib.h"