diff --git a/CMakeLists.txt b/CMakeLists.txt
index e7e8f1f..728e97d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,8 @@ INCLUDE_DIRECTORIES(
     ${OPENGL_INCLUDE_DIRS}
 
     ${SDL2_INCLUDE_DIRS}
+
+    ${GLM_INCLUDE_DIRS}
 )
 
 SET(SOURCE_FILES
diff --git a/src/main.hpp b/src/main.hpp
index c34880b..0de8cc3 100644
--- a/src/main.hpp
+++ b/src/main.hpp
@@ -2,6 +2,16 @@
 #include <chrono>
 #include <thread>
 
+// GLM is used as the mathematics library. It provides functions that are 
+// based on GLSL, and makes it really easy to generate projection and view
+// matrices.
+
+#include <glm/vec3.hpp>
+
+#include <glm/mat4x4.hpp>
+
+#include <glm/gtc/matrix_transform.hpp>
+
 // GLAD is used as the loader for OpenGL functions. On operating systems such
 // as OS X, a loader is not necessarily needed. However, on most other 
 // systems, a loader is required in order to use any OpenGL functions.