diff --git a/.gitmodules b/.gitmodules
index 17eaf734d..8587dd82d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -22,3 +22,6 @@
 [submodule "litex/soc/cores/cpu/rocket/verilog"]
 	path = litex/soc/cores/cpu/rocket/verilog
 	url = https://github.com/enjoy-digital/rocket-litex-verilog
+[submodule "litex/soc/cores/cpu/serv/verilog"]
+	path = litex/soc/cores/cpu/serv/verilog
+	url = https://github.com/olofk/serv