1 files changed, 3 insertions, 2 deletions

diff --git a/src/alloc.c b/src/alloc.c
index f2aeaa938eb..423c1f167db 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -4563,8 +4563,9 @@ void
 check_pure_size (void)
 {
   if (pure_bytes_used_before_overflow)
-    message ("emacs:0:Pure Lisp storage overflow (approx. %d bytes needed)",
-             (int) (pure_bytes_used + pure_bytes_used_before_overflow));
+    message (("emacs:0:Pure Lisp storage overflow (approx. %"pI"d"
+              " bytes needed)"),
+             pure_bytes_used + pure_bytes_used_before_overflow);
 }