diff --git a/src/main.c b/src/main.c
index 306779a..cc72651 100644
--- a/src/main.c
+++ b/src/main.c
@@ -107,6 +107,11 @@ static void cve_add_package_internal(struct source_package_t *pkg)
         for (em = issues; em; em = em->next) {
                 cur_id = em->data;
 
+                if (!cur_id) {
+                        fprintf(stderr, "Fatal configuration detected (null immutable item): Please report this issue to: https://github.com/ikeydoherty/cve-check-tool/issues/20\n");
+                        continue;
+                }
+
                 if (pkg_plugin->is_ignored && pkg_plugin->is_ignored(pkg, (gchar*)cur_id)) {
                         continue;
                 }