diff --git a/src/p_sectors.cpp b/src/p_sectors.cpp
index bec32a7b7..0f1da2dd2 100644
--- a/src/p_sectors.cpp
+++ b/src/p_sectors.cpp
@@ -24,6 +24,7 @@
 #include "p_spec.h"
 #include "c_cvars.h"
 #include "doomstat.h"
+#include "g_level.h"
 #include "r_main.h"
 #include "nodebuild.h"
 #include "po_man.h"