diff --git a/panda/src/ipc/Sources.pp b/panda/src/ipc/Sources.pp
index 90ffb558fa..ff491136d6 100644
--- a/panda/src/ipc/Sources.pp
+++ b/panda/src/ipc/Sources.pp
@@ -8,12 +8,17 @@
 #begin lib_target
   #define TARGET ipc
   
+  #define COMBINED_SOURCES $[TARGET]_composite1.cxx  
+  
   #define SOURCES                                                       \
     ipc.cxx ipc_atomics.h ipc_condition.h ipc_file.I ipc_file.h \
     ipc_library.h ipc_mach_traits.h ipc_mutex.h ipc_nspr_traits.h \
     ipc_nt_traits.h ipc_posix_traits.h \
     ipc_ps2_traits.h ipc_semaphore.h ipc_solaris_traits.h ipc_thread.h \
     ipc_traits.cxx ipc_traits.h
+    
+  #define INCLUDED_SOURCES                                                       \
+    ipc.cxx ipc_traits.cxx
 
   #define INSTALL_HEADERS                                       \
     ipc_mutex.h ipc_condition.h ipc_semaphore.h ipc_thread.h \
diff --git a/panda/src/ipc/ipc_composite1.cxx b/panda/src/ipc/ipc_composite1.cxx
new file mode 100644
index 0000000000..59bb41627c
--- /dev/null
+++ b/panda/src/ipc/ipc_composite1.cxx
@@ -0,0 +1,4 @@
+
+#include "ipc.cxx"
+#include "ipc_traits.cxx"
+