diff --git a/lib/Makefile b/lib/Makefile
index 4b5734a..a0fec60 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -40,6 +40,7 @@
 COBJS-y += display_options.o
 COBJS-y += errno.o
 COBJS-$(CONFIG_OF_CONTROL) += fdtdec.o
+COBJS-$(CONFIG_TEST_FDTDEC) += fdtdec_test.o
 COBJS-$(CONFIG_GZIP) += gunzip.o
 COBJS-y += hashtable.o
 COBJS-$(CONFIG_LMB) += lmb.o