diff --git a/0001-gmain-close-pidfd-when-finalizing-GChildWatchSource.patch b/0001-gmain-close-pidfd-when-finalizing-GChildWatchSource.patch
new file mode 100644
index 0000000..8ca96f2
--- /dev/null
+++ b/0001-gmain-close-pidfd-when-finalizing-GChildWatchSource.patch
@@ -0,0 +1,40 @@
+From b62745fe8e1699473f87caff328ac2c6ce394c55 Mon Sep 17 00:00:00 2001
+From: Christian Hergert <chergert@redhat.com>
+Date: Tue, 2 Aug 2022 12:35:40 -0700
+Subject: [PATCH] gmain: close pidfd when finalizing GChildWatchSource
+
+A file-descriptor was created with the introduction of pidfd_getfd() but
+nothing is closing it when the source finalizes. The GChildWatchSource is
+the creator and consumer of this FD and therefore responsible for closing
+it on finalization.
+
+The pidfd leak was introduced in !2408.
+
+This fixes issues with Builder where anon_inode:[pidfd] exhaust the
+available FD limit for the process.
+
+Fixes #2708
+---
+ glib/gmain.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/glib/gmain.c b/glib/gmain.c
+index a6f9b168e..dba5f40e4 100644
+--- a/glib/gmain.c
++++ b/glib/gmain.c
+@@ -5804,7 +5804,11 @@ g_child_watch_finalize (GSource *source)
+   GChildWatchSource *child_watch_source = (GChildWatchSource *) source;
+ 
+   if (child_watch_source->using_pidfd)
+-    return;
++    {
++      if (child_watch_source->poll.fd >= 0)
++        close (child_watch_source->poll.fd);
++      return;
++    }
+ 
+   G_LOCK (unix_signal_lock);
+   unix_child_watches = g_slist_remove (unix_child_watches, source);
+-- 
+2.37.1
+
diff --git a/glib2.spec b/glib2.spec
index 6e11ba6..37c18fd 100644
--- a/glib2.spec
+++ b/glib2.spec
@@ -23,6 +23,10 @@ Patch2: 2840.patch
 # https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2838
 Patch3: 2838.patch
 
+# Backported from upstream
+# https://bugzilla.redhat.com/show_bug.cgi?id=2109145
+Patch4: 0001-gmain-close-pidfd-when-finalizing-GChildWatchSource.patch
+
 BuildRequires: gcc
 BuildRequires: gcc-c++
 BuildRequires: gettext