1 files changed, 1 insertions, 1 deletions

diff --git a/lib-src/etags.c b/lib-src/etags.c
index 95553e9c42a..bf4a8f7015d 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -2242,7 +2242,7 @@ invalidate_nodes (fdesc *badfdp, node **npp)
                  with a right child.  */
               do {
                 np = pop_node (&stack);
-                if (np->fdp == badfdp)
+                if (np && np->fdp == badfdp)
                   np->valid = false;
               } while (np && np->right == NULL);
             }