diff --git a/winsup/cygwin/include/machine/_arc4random.h b/winsup/cygwin/include/machine/_arc4random.h
index 2078c3597..fd3970f64 100644
--- a/winsup/cygwin/include/machine/_arc4random.h
+++ b/winsup/cygwin/include/machine/_arc4random.h
@@ -25,4 +25,15 @@ extern int __isthreaded;
 	    __lock_release (_arc4random_mutex);	\
         } while (0)
 
+static inline void
+_arc4random_forkdetect(void)
+{
+  extern int __in_forkee;
+
+  if (__in_forkee)
+    rs = NULL;
+}
+#define _ARC4RANDOM_FORKDETECT() _arc4random_forkdetect ()
+
+__END_DECLS
 #endif /* _MACHINE_ARC4RANDOM_H */
diff --git a/winsup/cygwin/release/3.5.0 b/winsup/cygwin/release/3.5.0
index 611636b90..d756c0785 100644
--- a/winsup/cygwin/release/3.5.0
+++ b/winsup/cygwin/release/3.5.0
@@ -67,3 +67,9 @@ What changed:
 
 - The default RLIMIT_CORE is now 0, disabling the generation of core dump or
   stackdump files.
+
+Fixes:
+------
+
+- Fix arc4random reseeding after fork(2).
+  Addresses: https://cygwin.com/pipermail/cygwin/2024-January/255245.html