diff --git a/Makefile.am b/Makefile.am
index b9fc8ea..5df38cb 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -241,6 +241,8 @@
 check_LTLIBRARIES = $(TESTSUITE_OVERRIDE_LIBS)
 
 testsuite_uname_la_LDFLAGS = $(TESTSUITE_OVERRIDE_LIBS_LDFLAGS)
+testsuite_path_la_CPPFLAGS = $(AM_CPPFLAGS) \
+	-DABS_TOP_BUILDDIR=\"$(abs_top_builddir)\"
 testsuite_path_la_LDFLAGS = $(TESTSUITE_OVERRIDE_LIBS_LDFLAGS)
 
 testsuite_delete_module_la_LDFLAGS = $(TESTSUITE_OVERRIDE_LIBS_LDFLAGS)