diff --git a/.gitmodules b/.gitmodules
index 1b629d30..30c0036e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,6 @@
 [submodule "third_party/cmrc"]
 	path = third_party/cmrc
 	url = https://github.com/vector-of-bool/cmrc
+[submodule "third_party/glm"]
+	path = third_party/glm
+	url = https://github.com/g-truc/glm
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3af5ad00..df2fe581 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,6 +50,7 @@ add_subdirectory(third_party/SDL2)
 add_subdirectory(third_party/toml11)
 include_directories(${SDL2_INCLUDE_DIR})
 include_directories(third_party/toml11)
+include_directories(third_party/glm)
 
 add_subdirectory(third_party/cmrc)
 
diff --git a/third_party/glm b/third_party/glm
new file mode 160000
index 00000000..5c46b9c0
--- /dev/null
+++ b/third_party/glm
@@ -0,0 +1 @@
+Subproject commit 5c46b9c07008ae65cb81ab79cd677ecc1934b903