diff --git a/21705.patch b/21705.patch
new file mode 100644
index 0000000..51d5714
--- /dev/null
+++ b/21705.patch
@@ -0,0 +1,29 @@
+From ca52de3b56d5e70232bee29314cd84f5596c1e7f Mon Sep 17 00:00:00 2001
+From: Daan De Meyer <daan.j.demeyer@gmail.com>
+Date: Thu, 9 Dec 2021 15:46:13 +0100
+Subject: [PATCH] process-util: Fix memory leak
+
+---
+ src/basic/process-util.c | 9 ++++++---
+ 1 file changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/src/basic/process-util.c b/src/basic/process-util.c
+index 1b96d3ca8543..c97185215847 100644
+--- a/src/basic/process-util.c
++++ b/src/basic/process-util.c
+@@ -221,9 +221,12 @@ int get_process_cmdline(pid_t pid, size_t max_columns, ProcessCmdlineFlags flags
+                         return -ENOMEM;
+ 
+                 /* Drop trailing empty strings. See issue #21186. */
+-                STRV_FOREACH_BACKWARDS(p, args)
+-                        if (isempty(*p))
+-                                *p = mfree(*p);
++                STRV_FOREACH_BACKWARDS(p, args) {
++                        if (!isempty(*p))
++                                break;
++
++                        *p = mfree(*p);
++                }
+ 
+                 ans = quote_command_line(args, shflags);
+                 if (!ans)
diff --git a/systemd.spec b/systemd.spec
index 309d7fe..2a0ba01 100644
--- a/systemd.spec
+++ b/systemd.spec
@@ -92,6 +92,7 @@ GIT_DIR=../../src/systemd/.git git diffab -M v233..master@{2017-06-15} -- hwdb/[
 # here, rather than in the next section. Packit CI will drop any
 # patches in this range before applying upstream pull requests.
 
+Patch0001:      https://github.com/systemd/systemd/pull/21705.patch
 
 # Downstream-only patches (5000–9999)
 # https://bugzilla.redhat.com/show_bug.cgi?id=1738828