diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..31a66453e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "physics/rte-rrtmgp"]
+	path = physics/rte-rrtmgp
+	url = https://github.com/dustinswales/rte-rrtmgp
+        branch = rrtmgp-ccpp
\ No newline at end of file
diff --git a/physics/rte-rrtmgp b/physics/rte-rrtmgp
index a2566ac81..609a07bdf 160000
--- a/physics/rte-rrtmgp
+++ b/physics/rte-rrtmgp
@@ -1 +1 @@
-Subproject commit a2566ac81f6d7f63bc01be92388702c95f0a3703
+Subproject commit 609a07bdfe899989bf0171c14b7e63702fec9bcc