diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bc4a6114e..e1e7689a6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -16,6 +16,7 @@ set(SRB2_CORE_SOURCES
 	f_finale.c
 	f_wipe.c
 	filesrch.c
+	g_demo.c
 	g_game.c
 	g_input.c
 	hu_stuff.c
@@ -71,6 +72,7 @@ set(SRB2_CORE_HEADERS
 	f_finale.h
 	fastcmp.h
 	filesrch.h
+	g_demo.h
 	g_game.h
 	g_input.h
 	g_state.h
diff --git a/src/Makefile b/src/Makefile
index 701f2cfda..43cf48905 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -424,6 +424,7 @@ OBJS:=$(i_main_o) \
 		$(OBJDIR)/z_zone.o   \
 		$(OBJDIR)/f_finale.o \
 		$(OBJDIR)/f_wipe.o   \
+		$(OBJDIR)/g_demo.o   \
 		$(OBJDIR)/g_game.o   \
 		$(OBJDIR)/g_input.o  \
 		$(OBJDIR)/am_map.o   \
diff --git a/src/sdl/Srb2SDL-vc10.vcxproj b/src/sdl/Srb2SDL-vc10.vcxproj
index 7e260f4c0..6335b3028 100644
--- a/src/sdl/Srb2SDL-vc10.vcxproj
+++ b/src/sdl/Srb2SDL-vc10.vcxproj
@@ -213,6 +213,7 @@
     <ClInclude Include="..\fastcmp.h" />
     <ClInclude Include="..\filesrch.h" />
     <ClInclude Include="..\f_finale.h" />
+    <ClInclude Include="..\g_demo.h" />
     <ClInclude Include="..\g_game.h" />
     <ClInclude Include="..\g_input.h" />
     <ClInclude Include="..\g_state.h" />
@@ -364,6 +365,7 @@
     <ClCompile Include="..\filesrch.c" />
     <ClCompile Include="..\f_finale.c" />
     <ClCompile Include="..\f_wipe.c" />
+    <ClCompile Include="..\g_demo.c" />
     <ClCompile Include="..\g_game.c" />
     <ClCompile Include="..\g_input.c" />
     <ClCompile Include="..\hardware\hw3sound.c" />
diff --git a/src/sdl/Srb2SDL-vc10.vcxproj.filters b/src/sdl/Srb2SDL-vc10.vcxproj.filters
index 21820551a..a226e8397 100644
--- a/src/sdl/Srb2SDL-vc10.vcxproj.filters
+++ b/src/sdl/Srb2SDL-vc10.vcxproj.filters
@@ -180,6 +180,9 @@
     <ClInclude Include="..\f_finale.h">
       <Filter>F_Frame</Filter>
     </ClInclude>
+    <ClInclude Include="..\g_demo.h">
+      <Filter>G_Game</Filter>
+    </ClInclude>
     <ClInclude Include="..\g_game.h">
       <Filter>G_Game</Filter>
     </ClInclude>
@@ -600,6 +603,9 @@
     <ClCompile Include="..\f_wipe.c">
       <Filter>F_Frame</Filter>
     </ClCompile>
+    <ClCompile Include="..\g_demo.c">
+      <Filter>G_Game</Filter>
+    </ClCompile>
     <ClCompile Include="..\g_game.c">
       <Filter>G_Game</Filter>
     </ClCompile>