diff --git a/src/findfile.c b/src/findfile.c
index 4e2ad77..e0d9d66 100644
--- a/src/findfile.c
+++ b/src/findfile.c
@@ -1344,7 +1344,8 @@
     /*
      * New file/dir.  Add it to the list of visited files/dirs.
      */
-    vp = alloc(sizeof(ff_visited_T) + STRLEN(ff_expand_buffer));
+    vp = alloc(
+	     offsetof(ff_visited_T, ffv_fname) + STRLEN(ff_expand_buffer) + 1);
     if (vp == NULL)
 	return OK;