diff --git a/testSAX.c b/testSAX.c
index 7f3870a..5d5a189 100644
--- a/testSAX.c
+++ b/testSAX.c
@@ -255,7 +255,11 @@
               int type, int def, const xmlChar *defaultValue,
 	      xmlEnumerationPtr tree)
 {
-    fprintf(stdout, "SAX.attributeDecl(%s, %s, %d, %d, %s, ...)\n",
+    if (defaultValue == NULL)
+	fprintf(stdout, "SAX.attributeDecl(%s, %s, %d, %d, NULL, ...)\n",
+            elem, name, type, def);
+    else
+	fprintf(stdout, "SAX.attributeDecl(%s, %s, %d, %d, %s, ...)\n",
             elem, name, type, def, defaultValue);
 }