diff --git a/source/games/duke/src/animatesprites_d.cpp b/source/games/duke/src/animatesprites_d.cpp
index 87d636abe..ae7cadd48 100644
--- a/source/games/duke/src/animatesprites_d.cpp
+++ b/source/games/duke/src/animatesprites_d.cpp
@@ -37,6 +37,7 @@ source as it is released.
 #include "global.h"
 #include "prediction.h"
 #include "names_d.h"
+#include "dukeactor.h"
 
 EXTERN_CVAR(Bool, wt_commentary)
 
diff --git a/source/games/duke/src/animatesprites_r.cpp b/source/games/duke/src/animatesprites_r.cpp
index 1d5d95030..43a77664c 100644
--- a/source/games/duke/src/animatesprites_r.cpp
+++ b/source/games/duke/src/animatesprites_r.cpp
@@ -31,6 +31,7 @@ Prepared for public release: 03/21/2003 - Charlie Wiederhold, 3D Realms
 #include "global.h"
 #include "names_r.h"
 #include "prediction.h"
+#include "dukeactor.h"
 
 BEGIN_DUKE_NS
 
diff --git a/source/games/duke/src/render.cpp b/source/games/duke/src/render.cpp
index 52e863498..81e05c633 100644
--- a/source/games/duke/src/render.cpp
+++ b/source/games/duke/src/render.cpp
@@ -31,6 +31,7 @@ Modifications for JonoF's port by Jonathon Fowler (jf@jonof.id.au)
 #include "v_video.h"
 #include "prediction.h"
 #include "automap.h"
+#include "dukeactor.h"
 
 
 BEGIN_DUKE_NS
diff --git a/source/games/duke/src/sbar_d.cpp b/source/games/duke/src/sbar_d.cpp
index d7f66e495..4f11da2f8 100644
--- a/source/games/duke/src/sbar_d.cpp
+++ b/source/games/duke/src/sbar_d.cpp
@@ -42,6 +42,7 @@ source as it is released.
 #include "v_draw.h"
 #include "names_d.h"
 #include "texturemanager.h"
+#include "dukeactor.h"
 
 BEGIN_DUKE_NS
 
diff --git a/source/games/duke/src/sbar_r.cpp b/source/games/duke/src/sbar_r.cpp
index 9b4f1bc5a..24bc5417c 100644
--- a/source/games/duke/src/sbar_r.cpp
+++ b/source/games/duke/src/sbar_r.cpp
@@ -34,6 +34,7 @@ Prepared for public release: 03/21/2003 - Charlie Wiederhold, 3D Realms
 #include "v_draw.h"
 #include "names_r.h"
 #include "texturemanager.h"
+#include "dukeactor.h"
 
 BEGIN_DUKE_NS