diff --git a/src/dsectoreffect.cpp b/src/dsectoreffect.cpp
index 22acf74bce..466675dbcb 100644
--- a/src/dsectoreffect.cpp
+++ b/src/dsectoreffect.cpp
@@ -25,6 +25,7 @@
 #include "dsectoreffect.h"
 #include "gi.h"
 #include "p_local.h"
+#include "g_levellocals.h"
 #include "p_3dmidtex.h"
 #include "r_data/r_interpolate.h"
 #include "statnums.h"
diff --git a/src/gl/scene/gl_fakeflat.cpp b/src/gl/scene/gl_fakeflat.cpp
index 7fcc6d2399..98a70a1a8e 100644
--- a/src/gl/scene/gl_fakeflat.cpp
+++ b/src/gl/scene/gl_fakeflat.cpp
@@ -27,6 +27,7 @@
 
 #include "p_lnspec.h"
 #include "p_local.h"
+#include "g_levellocals.h"
 #include "a_sharedglobal.h"
 #include "r_sky.h"
 #include "gl/renderer/gl_renderer.h"
diff --git a/src/p_secnodes.cpp b/src/p_secnodes.cpp
index 8edfc0c700..b351f0e580 100644
--- a/src/p_secnodes.cpp
+++ b/src/p_secnodes.cpp
@@ -21,6 +21,7 @@
 //
 //-----------------------------------------------------------------------------
 
+#include "g_levellocals.h"
 #include "r_state.h"
 #include "p_maputl.h"
 #include "p_blockmap.h"
diff --git a/src/r_utility.cpp b/src/r_utility.cpp
index 5e9ac6b526..2cc422bebf 100644
--- a/src/r_utility.cpp
+++ b/src/r_utility.cpp
@@ -57,6 +57,7 @@
 #include "r_utility.h"
 #include "d_player.h"
 #include "p_local.h"
+#include "g_levellocals.h"
 #include "p_maputl.h"
 #include "math/cmath.h"