diff --git a/.gitmodules b/.gitmodules
index 9adff1253d..bdf041fe6b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "src/core_atmosphere/physics/physics_noaa/MYNN-SFC"]
 	path = src/core_atmosphere/physics/physics_noaa/MYNN-SFC
 	url = https://github.com/NCAR/MYNN-SFC.git
+[submodule "src/core_atmosphere/physics/physics_mmm"]
+	path = src/core_atmosphere/physics/physics_mmm
+	url = https://github.com/NCAR/MMM-physics.git
diff --git a/src/core_atmosphere/physics/.gitignore b/src/core_atmosphere/physics/.gitignore
index 66bc08bd5e..81bff6cb48 100644
--- a/src/core_atmosphere/physics/.gitignore
+++ b/src/core_atmosphere/physics/.gitignore
@@ -1,5 +1,4 @@
 *.f90
 physics_wrf/*.f90
 physics_wrf/files/
-physics_mmm
 UGWP
diff --git a/src/core_atmosphere/physics/physics_mmm b/src/core_atmosphere/physics/physics_mmm
new file mode 160000
index 0000000000..a4baf7f324
--- /dev/null
+++ b/src/core_atmosphere/physics/physics_mmm
@@ -0,0 +1 @@
+Subproject commit a4baf7f3243d1db0dbc5f63473f895bdbdc05c30