diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -736,10 +736,6 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\thread_win32.cpp"
-				>
-			</File>
-			<File
 				RelativePath=".\..\src\tile_map.cpp"
 				>
 			</File>
@@ -1504,10 +1500,6 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\thread.h"
-				>
-			</File>
-			<File
 				RelativePath=".\..\src\tile_cmd.h"
 				>
 			</File>
@@ -3581,6 +3573,18 @@
 			</File>
 		</Filter>
 		<Filter
+			Name="Threading"
+			>
+			<File
+				RelativePath=".\..\src\thread\thread.h"
+				>
+			</File>
+			<File
+				RelativePath=".\..\src\thread\thread_win32.cpp"
+				>
+			</File>
+		</Filter>
+		<Filter
 			Name="64-bit Specific Files"
 			Filter="asm"
 			>