diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7e3b24a..ef8ac38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ else()
 	message("--- Release ---")
 	set(CMAKE_BUILD_TYPE "Release")
 
-	# -O3     = Optimizations that increase compilation time and performance
+	# -O3     = Optimizations that increases compilation time and performance
 	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
 endif()
 
diff --git a/README.org b/README.org
index 8170e75..1e15ae6 100644
--- a/README.org
+++ b/README.org
@@ -45,4 +45,5 @@ Or
 
 * References
 
+- [[https://www.glfw.org/docs/latest/build_guide.html#build_link_cmake_source][Build GLFW using CMake]]
 - [[https://www.youtube.com/playlist?list=PLlrATfBNZ98dC-V-N3m0Go4deliWHPFwT][Game Engine]] by The Cherno
diff --git a/inferno/src/inferno/application.h b/inferno/src/inferno/application.h
index 5763189..ff690b4 100644
--- a/inferno/src/inferno/application.h
+++ b/inferno/src/inferno/application.h
@@ -11,14 +11,14 @@ namespace Inferno {
 
 		void run();
 
-		inline static Application &get() { return *s_instance; }
+		static inline Application &get() { return *s_instance; }
 
 	private:
 		static Application* s_instance;
 	};
 
 	// To be defined in the game
-	Application* createApplication();
+	extern Application* createApplication();
 
 }
 
diff --git a/inferno/src/inferno/entrypoint.h b/inferno/src/inferno/entrypoint.h
index 9a43408..78982eb 100644
--- a/inferno/src/inferno/entrypoint.h
+++ b/inferno/src/inferno/entrypoint.h
@@ -10,8 +10,6 @@
 #include "inferno/application.h"
 #include "inferno/log.h"
 
-extern Inferno::Application* Inferno::createApplication();
-
 int main(int argc, char* argv[])
 {
 	// Supress unused warning