diff --git a/Makefile b/Makefile
index 2fcf89f..266bd4f 100644
--- a/Makefile
+++ b/Makefile
@@ -128,6 +128,7 @@ install-common:
 
 	install -D -m 0440 misc/qubes.sudoers $(DESTDIR)/etc/sudoers.d/qubes
 	install -D -m 0440 misc/sudoers.d_qt_x11_no_mitshm $(DESTDIR)/etc/sudoers.d/qt_x11_no_mitshm
+	install -D -m 0440 misc/20_tcp_timestamps.conf $(DESTDIR)/etc/sysctl.d/20_tcp_timestamps.conf
 
 	install -d $(DESTDIR)/var/lib/qubes
 
diff --git a/misc/20_tcp_timestamps.conf b/misc/20_tcp_timestamps.conf
new file mode 100644
index 0000000..f47b8d3
--- /dev/null
+++ b/misc/20_tcp_timestamps.conf
@@ -0,0 +1 @@
+net.ipv4.tcp_timestamps=0