diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a468d8dc32..ddd2782d99 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-18  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* utils.c (dump_core) [HAVE_SETRLIMIT]: Cast RLIM_INFINITY to
+	rlim_t.
+
 2018-09-17  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
 
 	* python/lib/gdb/command/frame_filters.py (EnableFrameFilter):
diff --git a/gdb/utils.c b/gdb/utils.c
index d7980fe3a1..8d4a744e71 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -220,7 +220,7 @@ void
 dump_core (void)
 {
 #ifdef HAVE_SETRLIMIT
-  struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY };
+  struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY };
 
   setrlimit (RLIMIT_CORE, &rlim);
 #endif /* HAVE_SETRLIMIT */