diff --git a/package/flex/0004-Match-malloc-signature-to-its-use.patch b/package/flex/0004-Match-malloc-signature-to-its-use.patch
new file mode 100644
index 0000000000..ac57e3b4c8
--- /dev/null
+++ b/package/flex/0004-Match-malloc-signature-to-its-use.patch
@@ -0,0 +1,27 @@
+From 4b142954b54a57a9b0af0a9661056a9c39a8fa95 Mon Sep 17 00:00:00 2001
+From: Richard Barnes <rbarnes@umn.edu>
+Date: Wed, 2 Oct 2024 10:35:09 -0700
+Subject: [PATCH] Match `malloc` signature to its use
+
+Upstream: https://github.com/westes/flex/pull/674
+Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+---
+ lib/malloc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/malloc.c b/lib/malloc.c
+index 75e8ef9..701b9b3 100755
+--- a/lib/malloc.c
++++ b/lib/malloc.c
+@@ -3,7 +3,7 @@
+      
+      #include <sys/types.h>
+      
+-     void *malloc ();
++     void *malloc (size_t n);
+      
+      /* Allocate an N-byte block of memory from the heap.
+         If N is zero, allocate a 1-byte block.  */
+-- 
+2.39.5
+