diff --git a/lib/bzip2/Makefile b/lib/bzip2/Makefile
index f0b81ad..585d776 100644
--- a/lib/bzip2/Makefile
+++ b/lib/bzip2/Makefile
@@ -4,3 +4,4 @@
 
 obj-y += bzlib.o bzlib_crctable.o bzlib_decompress.o \
 	bzlib_randtable.o bzlib_huffman.o
+obj-$(CONFIG_SANDBOX) += bzlib_compress.o bzlib_blocksort.o