diff --git a/src/sdlf/CMakeLists.txt b/src/sdlf/CMakeLists.txt
index 51a2e1c..46ee51b 100644
--- a/src/sdlf/CMakeLists.txt
+++ b/src/sdlf/CMakeLists.txt
@@ -4,10 +4,10 @@ add_library(sdlf STATIC
 )
 
 target_include_directories(sdlf PRIVATE
-	"${CMAKE_SOURCE_DIR}/3rdparty/include/SDL"
+	"${PROJECT_SOURCE_DIR}/3rdparty/include/SDL"
 )
 
 target_link_libraries(sdlf PRIVATE
-	"${CMAKE_SOURCE_DIR}/3rdparty/lib/SDL2.lib"
-	"${CMAKE_SOURCE_DIR}/3rdparty/lib/SDL2main.lib"
+	"${PROJECT_SOURCE_DIR}/3rdparty/lib/SDL2.lib"
+	"${PROJECT_SOURCE_DIR}/3rdparty/lib/SDL2main.lib"
 )
\ No newline at end of file
diff --git a/src/sdlf/Screen.hpp b/src/sdlf/Screen.hpp
index 171d2d4..fe90342 100644
--- a/src/sdlf/Screen.hpp
+++ b/src/sdlf/Screen.hpp
@@ -4,6 +4,8 @@
 
 namespace sf
 {
+	class IWindow;
+
 	class IScreen : public ICallback
 	{
 	public: