diff --git a/mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100.patch b/mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100.patch
new file mode 100644
index 0000000..fd7a09e
--- /dev/null
+++ b/mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100.patch
@@ -0,0 +1,18 @@
+--- thunderbird-102.11.1/third_party/rust/mp4parse/src/lib.rs.mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100	2023-05-24 00:50:52.000000000 +0200
++++ thunderbird-102.11.1/third_party/rust/mp4parse/src/lib.rs	2023-06-08 14:17:40.193695212 +0200
+@@ -3184,8 +3184,13 @@ macro_rules! impl_mul {
+             type Output = $output;
+ 
+             fn mul(self, rhs: $rhs) -> Self::Output {
+-                static_assertions::const_assert!(<$output>::MAX <= <$inner>::MAX as u64);
+-                static_assertions::const_assert!(<$lhs>::MAX * <$rhs>::MAX <= <$output>::MAX);
++                static_assertions::const_assert!(
++                    <$output as UpperBounded>::MAX <= <$inner>::MAX as u64
++                );
++                static_assertions::const_assert!(
++                    <$lhs as UpperBounded>::MAX * <$rhs as UpperBounded>::MAX
++                        <= <$output as UpperBounded>::MAX
++                );
+ 
+                 let lhs: $inner = self.get().into();
+                 let rhs: $inner = rhs.get().into();
diff --git a/thunderbird.spec b/thunderbird.spec
index 488a626..29de379 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -140,6 +140,10 @@ Patch426:       gcc13-header-dependencies.patch
 # https://github.com/rust-lang/rust-bindgen/pull/2339
 Patch427:       rust-bindgen-2319-2339.patch
 
+# Needed with rust 1.70
+# https://github.com/mozilla/mp4parse-rust/commit/8b5b652d38e007e736bb442ccd5aa5ed699db100
+Patch428:       mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100.patch
+
 # PPC fix
 Patch304:       mozilla-1245783.patch
 
@@ -339,6 +343,8 @@ popd
 # MUST ONLY be applied for building against clang LLVM 16.
 # Would crash with earlier clang.
 %patch -P 427 -p1 -b .rust-bindgen-2319-2339
+# Needed with rust 1.70
+%patch -P 428 -p1 -b .mp4parse-rust-8b5b652d38e007e736bb442ccd5aa5ed699db100
 %endif
 
 %patch -P 501 -p1 -b .expat-CVE-2022-25235