-enc = env.Program(["encode_buffer.c", "$COMMON/person.pb.c", "$COMMON/pb_encode.o"])
-dec = env.Program(["decode_buffer.c", "$COMMON/person.pb.c", "$COMMON/pb_decode.o"])
+enc = env.Program(["encode_buffer.c", "$COMMON/person.pb.c", "$COMMON/pb_encode.o", "$COMMON/pb_common.o"])
+dec = env.Program(["decode_buffer.c", "$COMMON/person.pb.c", "$COMMON/pb_decode.o", "$COMMON/pb_common.o"])