diff --git a/D153716-arc4random.diff b/D153716-arc4random.diff
new file mode 100644
index 0000000..6bf20ed
--- /dev/null
+++ b/D153716-arc4random.diff
@@ -0,0 +1,45 @@
+diff --git a/ipc/chromium/src/third_party/libevent/README.mozilla b/ipc/chromium/src/third_party/libevent/README.mozilla
+--- a/ipc/chromium/src/third_party/libevent/README.mozilla
++++ b/ipc/chromium/src/third_party/libevent/README.mozilla
+@@ -20,8 +20,12 @@
+ Mac doesn't need this since only 64-bit is supported. Use __LP64__ to
+ distinguish the two cases. If you get something wrong, the CHECK_EVENT_SIZEOF
+ static assertions in message_pump_libevent.cc will fail. If a new constant is
+ added, also add a static assertion for it to message_pump_libevent.cc.
+ 
++You also need to modify the EVENT__HAVE_ARC4RANDOM and EVENT__HAVE_ARC4RANDOM_BUF
++constants in the generated Linux header to account for the results of the arc4random
++and arc4random_buf configure checks.
++
+ 2. No additional patches are needed at this time, but be careful to avoid
+ clobbering changes to the various event-config.h files which have been customized
+ over time to avoid various build bustages.
+diff --git a/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h b/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
+--- a/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
++++ b/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
+@@ -27,18 +27,22 @@
+ #define EVENT__HAVE_ACCEPT4 1
+ 
+ /* Define to 1 if you have the <afunix.h> header file. */
+ /* #undef EVENT__HAVE_AFUNIX_H 1 */
+ 
++#ifdef HAVE_ARC4RANDOM
+ /* Define to 1 if you have the `arc4random' function. */
+-/* #undef EVENT__HAVE_ARC4RANDOM */
++#define EVENT__HAVE_ARC4RANDOM 1
++#endif
+ 
+ /* Define to 1 if you have the `arc4random_addrandom' function. */
+ /* #undef EVENT__HAVE_ARC4RANDOM_ADDRANDOM */
+ 
++#ifdef HAVE_ARC4RANDOM_BUF
+ /* Define to 1 if you have the `arc4random_buf' function. */
+-/* #undef EVENT__HAVE_ARC4RANDOM_BUF */
++#define EVENT__HAVE_ARC4RANDOM_BUF 1
++#endif
+ 
+ /* Define to 1 if you have the <arpa/inet.h> header file. */
+ #define EVENT__HAVE_ARPA_INET_H 1
+ 
+ /* Define to 1 if you have the `clock_gettime' function. */
+
diff --git a/thunderbird.spec b/thunderbird.spec
index bb4952e..22741ef 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -128,6 +128,7 @@ Patch415:       Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
 Patch418:       mozilla-1512162.patch
 Patch419:        cbindgen-already-covers.patch
 Patch420:        D154024.diff
+Patch421:        D153716-arc4random.diff
 #Patch419:       bindgen-d0dfc52706f23db9dc9d74642eeebd89d73cb8d0.patch
 Patch103:       rhbz-1219542-s390-build.patch
 # gcc 12 build fix patches
@@ -306,7 +307,8 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 %patch418 -p1 -b .mozbz-1512162
 %patch419 -p1 -b .cbindgen-already-covers
 #arc4random failures
-%patch420 -p1 -b .D154024.diff
+%patch420 -p1 -b .D154024
+%patch421 -p1 -b .D153716-arc4random
 # most likely fixed
 #%patch419 -p1 -b .bindgen