diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index b9d76a6da1..5a5d750149 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -1143,6 +1143,10 @@
 				RelativePath=".\..\src\network\network.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\network\network_base.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\network\network_client.h"
 				>
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index 0882727c96..91e051306e 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -1140,6 +1140,10 @@
 				RelativePath=".\..\src\network\network.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\network\network_base.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\network\network_client.h"
 				>
diff --git a/source.list b/source.list
index b15e83d407..5c153f69f1 100644
--- a/source.list
+++ b/source.list
@@ -218,6 +218,7 @@ mixer.h
 music.h
 namegen_func.h
 network/network.h
+network/network_base.h
 network/network_client.h
 network/network_func.h
 network/network_gamelist.h