diff --git a/backends/graphics3d/opengl/framebuffer.cpp b/backends/graphics3d/opengl/framebuffer.cpp
index ea23a64e235..f757a661f9a 100644
--- a/backends/graphics3d/opengl/framebuffer.cpp
+++ b/backends/graphics3d/opengl/framebuffer.cpp
@@ -22,7 +22,7 @@
 #include "common/textconsole.h"
 #include "common/util.h"
 
-#if (defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)) && !defined(AMIGAOS) && !defined(__MORPHOS__)
+#if defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
 
 #include "backends/graphics3d/opengl/framebuffer.h"
 
@@ -124,7 +124,7 @@ void FrameBuffer::detach() {
 	glViewport(_prevStateViewport[0], _prevStateViewport[1], _prevStateViewport[2], _prevStateViewport[3]);
 }
 
-#if !USE_FORCED_GLES2 && !defined(AMIGAOS) && !defined(__MORPHOS__)
+#if !USE_FORCED_GLES2
 MultiSampleFrameBuffer::MultiSampleFrameBuffer(uint width, uint height, int samples)
 		: FrameBuffer(width,height) {
 	if (!OpenGLContext.framebufferObjectMultisampleSupported) {
@@ -186,7 +186,7 @@ void MultiSampleFrameBuffer::detach() {
 	glViewport(_prevStateViewport[0], _prevStateViewport[1], _prevStateViewport[2], _prevStateViewport[3]);
 }
 
-#endif // !USE_FORCED_GLES2 && !defined(AMIGAOS) && !defined(__MORPHOS__)
+#endif // !USE_FORCED_GLES2
 
 } // End of namespace OpenGL
 
diff --git a/backends/graphics3d/opengl/framebuffer.h b/backends/graphics3d/opengl/framebuffer.h
index 84189a8d4b7..976e59c8b09 100644
--- a/backends/graphics3d/opengl/framebuffer.h
+++ b/backends/graphics3d/opengl/framebuffer.h
@@ -34,17 +34,10 @@ class FrameBuffer : public TextureGL {
 public:
 	FrameBuffer(uint width, uint height);
 	FrameBuffer(GLuint texture_name, uint width, uint height, uint texture_width, uint texture_height);
-#if defined(AMIGAOS) || defined(__MORPHOS__)
-	virtual ~FrameBuffer() {}
-
-	void attach() {}
-	void detach() {}
-#else
 	virtual ~FrameBuffer();
 
 	virtual void attach();
 	virtual void detach();
-#endif
 
 protected:
 	GLuint getFrameBufferName() const { return _frameBuffer; }
@@ -56,7 +49,7 @@ private:
 	GLint _prevStateViewport[4];
 };
 
-#if !USE_FORCED_GLES2 && !defined(AMIGAOS) && !defined(__MORPHOS__)
+#if !USE_FORCED_GLES2
 class MultiSampleFrameBuffer : public FrameBuffer {
 public:
 	MultiSampleFrameBuffer(uint width, uint height, int samples);
diff --git a/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp b/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
index aef35b94f70..fa827e0d709 100644
--- a/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
+++ b/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
@@ -356,13 +356,11 @@ void OpenGLSdlGraphics3dManager::createOrUpdateScreen() {
 
 	_screenChangeCount++;
 
-#if !defined(__amigaos4__) && !defined(__MORPHOS__)
 	if (renderToFrameBuffer) {
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 		_frameBuffer = createFramebuffer(_engineRequestedWidth, _engineRequestedHeight);
 		_frameBuffer->attach();
 	}
-#endif
 }
 
 Math::Rect2d OpenGLSdlGraphics3dManager::computeGameRect(bool renderToFrameBuffer, uint gameWidth, uint gameHeight,
@@ -579,7 +577,6 @@ void OpenGLSdlGraphics3dManager::drawOverlay() {
 	_surfaceRenderer->restorePreviousState();
 }
 
-#if !defined(__amigaos4__) && !defined(__MORPHOS__)
 OpenGL::FrameBuffer *OpenGLSdlGraphics3dManager::createFramebuffer(uint width, uint height) {
 #if !USE_FORCED_GLES2
 	if (_antialiasing && OpenGLContext.framebufferObjectMultisampleSupported) {
@@ -590,7 +587,6 @@ OpenGL::FrameBuffer *OpenGLSdlGraphics3dManager::createFramebuffer(uint width, u
 		return new OpenGL::FrameBuffer(width, height);
 	}
 }
-#endif
 
 void OpenGLSdlGraphics3dManager::updateScreen() {
 	if (_frameBuffer) {
diff --git a/backends/platform/sdl/sdl.cpp b/backends/platform/sdl/sdl.cpp
index 8f01465d373..d5b6b453240 100644
--- a/backends/platform/sdl/sdl.cpp
+++ b/backends/platform/sdl/sdl.cpp
@@ -328,7 +328,7 @@ void OSystem_SDL::detectOpenGLFeaturesSupport() {
 	_oglType = OpenGL::kOGLContextGLES2;
 	_supportsFrameBuffer = true;
 	_supportsShaders = true;
-#elif !defined(AMIGAOS) && !defined(__MORPHOS__)
+#else
 	// Spawn a 32x32 window off-screen with a GL context to test if framebuffers are supported
 #if SDL_VERSION_ATLEAST(2, 0, 0)
 	SDL_Window *window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 32, 32, SDL_WINDOW_OPENGL | SDL_WINDOW_HIDDEN);