diff --git a/pkgs/development/python-modules/aiomultiprocess/default.nix b/pkgs/development/python-modules/aiomultiprocess/default.nix
index 33dd3aa48627..4226de7c027f 100644
--- a/pkgs/development/python-modules/aiomultiprocess/default.nix
+++ b/pkgs/development/python-modules/aiomultiprocess/default.nix
@@ -18,6 +18,11 @@ buildPythonPackage rec {
     hash = "sha256-LWrAr3i2CgOMZFxWi9B3kiou0UtaHdDbpkr6f9pReRA=";
   };
 
+  patches = [
+    # https://github.com/omnilib/aiomultiprocess/issues/220
+    ./python314-compat.patch
+  ];
+
   build-system = [ flit-core ];
 
   nativeCheckInputs = [ pytestCheckHook ];
diff --git a/pkgs/development/python-modules/aiomultiprocess/python314-compat.patch b/pkgs/development/python-modules/aiomultiprocess/python314-compat.patch
new file mode 100644
index 000000000000..9a5cdad65d8f
--- /dev/null
+++ b/pkgs/development/python-modules/aiomultiprocess/python314-compat.patch
@@ -0,0 +1,21 @@
+diff --git a/aiomultiprocess/tests/base.py b/aiomultiprocess/tests/base.py
+--- a/aiomultiprocess/tests/base.py
++++ b/aiomultiprocess/tests/base.py
+@@ -56,7 +56,7 @@ async def terminate(process):
+ def async_test(fn):
+     @wraps(fn)
+     def wrapper(*args, **kwargs):
+-        loop = asyncio.get_event_loop()
++        loop = asyncio.new_event_loop()
+         return loop.run_until_complete(fn(*args, **kwargs))
+
+     return wrapper
+@@ -66,7 +66,7 @@ def perf_test(fn):
+     @wraps(fn)
+     @skipUnless(RUN_PERF_TESTS, "Performance test")
+     def wrapper(*args, **kwargs):
+-        loop = asyncio.get_event_loop()
++        loop = asyncio.new_event_loop()
+         return loop.run_until_complete(fn(*args, **kwargs))
+
+     return wrapper