diff --git a/panda/src/dxgsg9/Sources.pp b/panda/src/dxgsg9/Sources.pp
index fd40c6f53e..270c914b30 100755
--- a/panda/src/dxgsg9/Sources.pp
+++ b/panda/src/dxgsg9/Sources.pp
@@ -29,7 +29,8 @@
     dxIndexBufferContext9.h dxIndexBufferContext9.I \
     dxTextureContext9.h dxTextureContext9.I \
     dxGeomMunger9.h dxGeomMunger9.I \
-    dxGraphicsDevice9.h
+    dxGraphicsDevice9.h \
+    lru.h
     
   #define INCLUDED_SOURCES \
     config_dxgsg9.cxx \
@@ -40,7 +41,8 @@
     dxGraphicsDevice9.cxx \
     wdxGraphicsPipe9.cxx \
     wdxGraphicsWindow9.cxx \
-    wdxGraphicsBuffer9.cxx
+    wdxGraphicsBuffer9.cxx \
+    lru.cxx
 
 
 #end lib_target