diff --git a/library/Makefile b/library/Makefile
index a67160c..0fb6eeb 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -105,6 +105,7 @@
 	     md5.o \
 	     memory_buffer_alloc.o \
              mps/reader.o \
+             mps/trace.o \
 	     nist_kw.o \
 	     oid.o \
 	     padlock.o \