diff --git a/.gitmodules b/.gitmodules
index ba8877ce5..b396b1d43 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -20,3 +20,6 @@
 [submodule "addins/sky130_osu_sc_t18"]
 	path = addins/sky130_osu_sc_t18
 	url = https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_osu_sc_t18
+[submodule "addins/sky130_osu_sc_t12"]
+	path = addins/sky130_osu_sc_t12
+	url = https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_osu_sc_t12
diff --git a/addins/sky130_osu_sc_t12 b/addins/sky130_osu_sc_t12
new file mode 160000
index 000000000..f1eef8447
--- /dev/null
+++ b/addins/sky130_osu_sc_t12
@@ -0,0 +1 @@
+Subproject commit f1eef844734f73d3c79d83b82352118263eb7686