diff --git a/repos/libports/run/nic_router.run b/repos/libports/run/nic_router.run
index bcd9fea35a..8d96cae44a 100644
--- a/repos/libports/run/nic_router.run
+++ b/repos/libports/run/nic_router.run
@@ -270,6 +270,6 @@ proc nic_qemu_args { } {
 	if {[have_spec x86]}     { return "-net nic,model=e1000" }
 	if {[have_spec lan9118]} { return "-net nic,model=lan9118" } }
 
-append qemu_args { -m 256 -nographic -net user -redir udp:5555::1337 } [nic_qemu_args]
+append qemu_args { -m 384 -nographic -net user -redir udp:5555::1337 } [nic_qemu_args]
 
 run_genode_until {.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n.*Test done.*\n} 60