diff --git a/panda/src/dxgsg/Sources.pp b/panda/src/dxgsg/Sources.pp
index dd833597ee..446158e38a 100644
--- a/panda/src/dxgsg/Sources.pp
+++ b/panda/src/dxgsg/Sources.pp
@@ -17,14 +17,13 @@
     config_dxgsg.h dxGraphicsStateGuardian.I \
     dxGraphicsStateGuardian.cxx dxGraphicsStateGuardian.h \
     dxSavedFrameBuffer.I dxSavedFrameBuffer.h \
-    dxTextureContext.I dxTextureContext.h dxGeomNodeContext.h dxGeomNodeContext.I
+    dxTextureContext.h dxGeomNodeContext.h dxGeomNodeContext.I
     
   #define INCLUDED_SOURCES \
     config_dxgsg.cxx dxSavedFrameBuffer.cxx dxTextureContext.cxx dxGeomNodeContext.cxx
     
   #define INSTALL_HEADERS \
     config_dxgsg.h dxGraphicsStateGuardian.I dxGraphicsStateGuardian.h \
-    dxSavedFrameBuffer.I dxSavedFrameBuffer.h dxTextureContext.I \
-    dxTextureContext.h
+    dxSavedFrameBuffer.I dxSavedFrameBuffer.h dxTextureContext.h
 
 #end lib_target