-SUBDIRS = . io unittests tests pyunittests python threads
+# InterprocessSyncFile has a dependency on isc::util::thread::Mutex
+SUBDIRS = threads . io unittests tests pyunittests python
AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
AM_CPPFLAGS += -I$(top_srcdir)/src/lib/util -I$(top_builddir)/src/lib/util
EXTRA_DIST = python/pycppwrapper_util.h
-libb10_util_la_LIBADD = $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
+libb10_util_la_LIBADD = $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
+libb10_util_la_LIBADD += $(top_builddir)/src/lib/util/threads/libb10-threads.la
CLEANFILES = *.gcno *.gcda
libb10_util_includedir = $(includedir)/$(PACKAGE_NAME)/util