diff --git a/pandatool/src/cvscopy/Sources.pp b/pandatool/src/cvscopy/Sources.pp
index 4840700ff2..4d0bd69e76 100644
--- a/pandatool/src/cvscopy/Sources.pp
+++ b/pandatool/src/cvscopy/Sources.pp
@@ -6,9 +6,13 @@
   #define OTHER_LIBS \
     linmath:c panda:m dconfig:c dtool:m pystub
 
+  #define COMBINED_SOURCES $[TARGET]_composite1.cxx 
+    
   #define SOURCES \
-    cvsCopy.cxx cvsCopy.h cvsSourceDirectory.cxx cvsSourceDirectory.h \
-    cvsSourceTree.cxx cvsSourceTree.h
+    cvsCopy.h cvsSourceDirectory.h cvsSourceTree.h  
+
+  #define INCLUDED_SOURCES \
+    cvsCopy.cxx cvsSourceDirectory.cxx cvsSourceTree.cxx
 
   #define INSTALL_HEADERS \
     cvsCopy.h
diff --git a/pandatool/src/cvscopy/cvscopy_composite1.cxx b/pandatool/src/cvscopy/cvscopy_composite1.cxx
new file mode 100644
index 0000000000..3447005d49
--- /dev/null
+++ b/pandatool/src/cvscopy/cvscopy_composite1.cxx
@@ -0,0 +1,5 @@
+
+#include "cvsCopy.cxx"
+#include "cvsSourceDirectory.cxx"
+#include "cvsSourceTree.cxx"
+