diff --git a/panda/src/wgldisplay/Sources.pp b/panda/src/wgldisplay/Sources.pp
index a942fb49c7..3ed40da970 100644
--- a/panda/src/wgldisplay/Sources.pp
+++ b/panda/src/wgldisplay/Sources.pp
@@ -7,10 +7,14 @@
   #define TARGET wgldisplay
   #define LOCAL_LIBS \
     glgsg display putil
+    
+  #define COMBINED_SOURCES $[TARGET]_composite1.cxx 
 
   #define SOURCES \
-    config_wgldisplay.cxx config_wgldisplay.h wglGraphicsPipe.cxx \
-    wglGraphicsPipe.h wglGraphicsWindow.cxx wglGraphicsWindow.h
+    config_wgldisplay.h wglGraphicsPipe.h wglGraphicsWindow.cxx wglGraphicsWindow.h
+    
+  #define INCLUDED_SOURCES \
+    config_wgldisplay.cxx wglGraphicsPipe.cxx
 
   #define INSTALL_HEADERS \
      config_wgldisplay.h wglGraphicsPipe.h wglGraphicsWindow.h
diff --git a/panda/src/wgldisplay/wgldisplay_composite1.cxx b/panda/src/wgldisplay/wgldisplay_composite1.cxx
new file mode 100644
index 0000000000..9e626a1d40
--- /dev/null
+++ b/panda/src/wgldisplay/wgldisplay_composite1.cxx
@@ -0,0 +1,3 @@
+
+#include"config_wgldisplay.cxx"
+#include"wglGraphicsPipe.cxx"