diff --git a/config.h b/config.h
index 4483c3d..23340fb 100644
--- a/config.h
+++ b/config.h
@@ -63,6 +63,7 @@ static const Rule rules[] = {
 static const float mfact     = 0.55; /* factor of master area size [0.05..0.95] */
 static const int nmaster     = 1;    /* number of clients in master area */
 static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
+static const int lockfullscreen = 1; /* 1 will force focus on the fullscreen window */
 static const int centerfirst = 1;    /* center first window if it has rule */
 
 static const Layout layouts[] = {