diff --git a/libass/libass.vcproj b/libass/libass.vcproj
index b5a53d4b6..04ca64b21 100644
--- a/libass/libass.vcproj
+++ b/libass/libass.vcproj
@@ -149,94 +149,94 @@
 	<References>
 	</References>
 	<Files>
-		<File
-			RelativePath=".\ass.c"
+		<Filter
+			Name="Source Files"
 			>
-		</File>
-		<File
-			RelativePath=".\ass.h"
+			<File
+				RelativePath=".\ass.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_bitmap.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_cache.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_font.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_fontconfig.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_library.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_render.c"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_utils.c"
+				>
+			</File>
+			<File
+				RelativePath=".\mputils.c"
+				>
+			</File>
+		</Filter>
+		<Filter
+			Name="Header Files"
 			>
-		</File>
-		<File
-			RelativePath=".\ass_bitmap.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_bitmap.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_cache.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_cache.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_font.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_font.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_fontconfig.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_fontconfig.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_library.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_library.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_render.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_types.h"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_utils.c"
-			>
-		</File>
-		<File
-			RelativePath=".\ass_utils.h"
-			>
-		</File>
-		<File
-			RelativePath=".\help_mp.h"
-			>
-		</File>
-		<File
-			RelativePath=".\Makefile.am"
-			>
-		</File>
-		<File
-			RelativePath=".\Makefile.in"
-			>
-		</File>
-		<File
-			RelativePath=".\mputils.c"
-			>
-		</File>
-		<File
-			RelativePath=".\mputils.h"
-			>
-		</File>
-		<File
-			RelativePath=".\msvc.h"
-			>
-		</File>
+			<File
+				RelativePath=".\ass.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_bitmap.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_cache.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_font.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_fontconfig.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_library.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_types.h"
+				>
+			</File>
+			<File
+				RelativePath=".\ass_utils.h"
+				>
+			</File>
+			<File
+				RelativePath=".\help_mp.h"
+				>
+			</File>
+			<File
+				RelativePath=".\mputils.h"
+				>
+			</File>
+			<File
+				RelativePath=".\msvc.h"
+				>
+			</File>
+		</Filter>
 	</Files>
 	<Globals>
 	</Globals>