diff -aruN a/Makefile.in b/Makefile.in
--- a/Makefile.in	2010-10-20 18:16:18.000000000 -0700
+++ b/Makefile.in	2010-11-05 09:25:40.041847746 -0700
@@ -1088,7 +1088,14 @@
 default.supp: $(DEFAULT_SUPP_FILES)
 	echo "# This is a generated file, composed of the following suppression rules:" > default.supp
 	echo "# " $(DEFAULT_SUPP_FILES) >> default.supp
-	cat $(DEFAULT_SUPP_FILES) >> default.supp
+	for file in $(DEFAULT_SUPP_FILES); do \
+		if [ -r $(srcdir)/$$file ]; then \
+			path=$(srcdir)/$$file; \
+		else \
+			path=$(builddir)/$$file; \
+		fi; \
+		cat $$path >> default.supp; \
+	done
 
 regtest: check
 	@PERL@ tests/vg_regtest $(TEST_TOOLS) $(TEST_EXP_TOOLS)