diff --git a/build-python3.10.patch b/build-python3.10.patch
new file mode 100644
index 0000000..40766b3
--- /dev/null
+++ b/build-python3.10.patch
@@ -0,0 +1,12 @@
+diff -up thunderbird-78.12.0/python/mach/mach/main.py.python3.10 thunderbird-78.12.0/python/mach/mach/main.py
+--- thunderbird-78.12.0/python/mach/mach/main.py.python3.10	2021-07-27 08:10:52.680466611 +0200
++++ thunderbird-78.12.0/python/mach/mach/main.py	2021-07-27 08:11:17.377561233 +0200
+@@ -16,7 +16,7 @@ import os
+ import sys
+ import traceback
+ import uuid
+-from collections import Iterable
++from collections.abc import Iterable
+ 
+ from six import string_types
+ 
diff --git a/thunderbird.spec b/thunderbird.spec
index 6dcc937..e889fa2 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -119,6 +119,7 @@ Patch417:       build-aarch64-user_vfp.patch
 Patch418:       mozilla-1512162.patch
 Patch419:       bindgen-d0dfc52706f23db9dc9d74642eeebd89d73cb8d0.patch
 Patch103:       rhbz-1219542-s390-build.patch
+Patch104:       build-python3.10.patch
 
 # PPC fix
 Patch304:       mozilla-1245783.patch
@@ -263,6 +264,11 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 %patch103 -p1 -b .rhbz-1219542-s390-build
 %endif
 
+%if 0%{?fedora} >= 35
+# since python3.10 we need to use  `from collections.abc` instead of `from collections`. 
+%patch104 -p1 -b .python3.10
+%endif
+
 %patch304 -p1 -b .1245783
 # Patch for big endian platforms only
 #%if 0%{?big_endian}