diff --git a/build/aegisub_vs2008/aegisub_vs2008.vcproj b/build/aegisub_vs2008/aegisub_vs2008.vcproj
index 5661123d0..3e1846cf2 100644
--- a/build/aegisub_vs2008/aegisub_vs2008.vcproj
+++ b/build/aegisub_vs2008/aegisub_vs2008.vcproj
@@ -1561,6 +1561,14 @@
 				RelativePath="..\..\aegisub\keyframe.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\aegisub\lavc_keyframes.cpp"
+				>
+			</File>
+			<File
+				RelativePath="..\..\aegisub\lavc_keyframes.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\aegisub\video_box.cpp"
 				>