diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -596,10 +596,6 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\md5.cpp"
-				>
-			</File>
-			<File
 				RelativePath=".\..\src\misc.cpp"
 				>
 			</File>
@@ -1116,10 +1112,6 @@
 				>
 			</File>
 			<File
-				RelativePath=".\..\src\md5.h"
-				>
-			</File>
-			<File
 				RelativePath=".\..\src\mixer.h"
 				>
 			</File>
@@ -2329,6 +2321,18 @@
 			</File>
 		</Filter>
 		<Filter
+			Name="MD5"
+			>
+			<File
+				RelativePath=".\..\src\3rdparty\md5\md5.cpp"
+				>
+			</File>
+			<File
+				RelativePath=".\..\src\3rdparty\md5\md5.h"
+				>
+			</File>
+		</Filter>
+		<Filter
 			Name="MiniLZO"
 			>
 			<File