diff --git a/tests/Makefile b/tests/Makefile
index 990637d..ec1ce88 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -19,8 +19,8 @@
 		test_suite_md			test_suite_mdx			\
 		test_suite_mpi			test_suite_pkcs1_v21	\
 		test_suite_rsa			test_suite_shax			\
-		test_suite_x509parse	test_suite_xtea			\
-		test_suite_version
+		test_suite_x509parse	test_suite_x509write	\
+		test_suite_xtea			test_suite_version
 
 .SILENT:
 
@@ -126,6 +126,10 @@
 	echo   "  CC    	$@.c"
 	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@
 
+test_suite_x509write: test_suite_x509write.c ../library/libpolarssl.a
+	echo   "  CC    	$@.c"
+	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@
+
 test_suite_xtea: test_suite_xtea.c ../library/libpolarssl.a
 	echo   "  CC    	$@.c"
 	$(CC) $(CFLAGS) $(OFLAGS) $@.c	$(LDFLAGS) -o $@