diff --git a/src/rrd_open.c b/src/rrd_open.c
index 27965062ae811df26367e41371579f5604951818..f262413befce5f8e9f561b4d32eef0bfaef8a87f 100644 (file)
--- a/src/rrd_open.c
+++ b/src/rrd_open.c
unsigned long i;
ssize_t _page_size = sysconf(_SC_PAGESIZE);
+ if (rrd_file == NULL) {
+#if defined DEBUG && DEBUG
+ fprintf (stderr, "rrd_dontneed: Argument 'rrd_file' is NULL.\n");
+#endif
+ return;
+ }
+
#if defined DEBUG && DEBUG > 1
mincore_print(rrd_file, "before");
#endif