diff --git a/ultramarine/ultramarine-system-configs/50-mtu-probing.conf b/ultramarine/ultramarine-system-configs/50-mtu-probing.conf
new file mode 100644
index 0000000..ce99fca
--- /dev/null
+++ b/ultramarine/ultramarine-system-configs/50-mtu-probing.conf
@@ -0,0 +1,7 @@
+# Enables MTU Probing for IPv4
+# Fixes a quirk with some home network setups and
+# some applications/games that have QoS issues with large packets
+# e.g. Minecraft, Ubisoft Connect, etc.
+# https://blog.cloudflare.com/path-mtu-discovery-in-practice/
+# https://www.reddit.com/r/linux_gaming/comments/10oc0dq/comment/j6e0ds2
+net.ipv4.tcp_mtu_probing=1
diff --git a/ultramarine/ultramarine-system-configs/networking-tweaks.conf b/ultramarine/ultramarine-system-configs/networking-tweaks.conf
index 154395d..53e8519 100644
--- a/ultramarine/ultramarine-system-configs/networking-tweaks.conf
+++ b/ultramarine/ultramarine-system-configs/networking-tweaks.conf
@@ -1,11 +1,3 @@
-# Enables MTU Probing for IPv4
-# Fixes a quirk with some home network setups and
-# some applications/games that have QoS issues with large packets
-# e.g. Minecraft, Ubisoft Connect, etc.
-# https://blog.cloudflare.com/path-mtu-discovery-in-practice/
-# https://www.reddit.com/r/linux_gaming/comments/10oc0dq/comment/j6e0ds2
-net.ipv4.tcp_mtu_probing=1
-
 # Enable TCP Fast Open
 # Reduces latency for opening connections
 # https://lwn.net/Articles/508865/
diff --git a/ultramarine/ultramarine-system-configs/ultramarine-system-configs.spec b/ultramarine/ultramarine-system-configs/ultramarine-system-configs.spec
index fb0e80f..6e864f7 100644
--- a/ultramarine/ultramarine-system-configs/ultramarine-system-configs.spec
+++ b/ultramarine/ultramarine-system-configs/ultramarine-system-configs.spec
@@ -10,6 +10,7 @@ Source1:        tmpfiles-cleanup.conf
 Source2:        ultramarine-logrotate.conf
 Source3:        networking-tweaks.conf
 Source4:        bbr.conf
+Source5:        50-mtu-probing.conf
 
 BuildRequires:  /usr/bin/install
 
@@ -47,6 +48,7 @@ install -Dm644 %{SOURCE1} %{buildroot}/etc/tmpfiles.d/tmpfiles-cleanup.conf
 install -Dm644 %{SOURCE2} %{buildroot}/etc/logrotate.d/ultramarine-logrotate.conf
 install -Dm644 %{SOURCE3} %{buildroot}/etc/sysctl.d/50-networking-tweaks.conf
 install -Dm644 %{SOURCE4} %{buildroot}/etc/modules-load.d/bbr.conf
+install -Dm644 %{SOURCE5} %{buildroot}/etc/sysctl.d/50-mtu-probing.conf
 
 %files
 
@@ -61,6 +63,7 @@ install -Dm644 %{SOURCE4} %{buildroot}/etc/modules-load.d/bbr.conf
 %config /etc/tmpfiles.d/tmpfiles-cleanup.conf
 %config /etc/systemd/journald.conf.d/journal-cleanup.conf
 %config /etc/logrotate.d/ultramarine-logrotate.conf
+%config /etc/sysctl.d/50-mtu-probing.conf
 
 %changelog
 * Sat Aug 03 2024 Cappy Ishihara <cappy@cappuchino.xyz>