diff --git a/backends/graphics/opengl/glerrorcheck.cpp b/backends/graphics/opengl/glerrorcheck.cpp
index 3abcc27eedd..9989a4cf9d8 100644
--- a/backends/graphics/opengl/glerrorcheck.cpp
+++ b/backends/graphics/opengl/glerrorcheck.cpp
@@ -39,10 +39,10 @@
 #undef ARRAYSIZE
 #endif
 
-#ifdef MACOSX
-#include <OpenGL/gl.h>
-#elif defined(USE_GLES)
+#if defined(USE_GLES)
 #include <GLES/gl.h>
+#elif defined(MACOSX)
+#include <OpenGL/gl.h>
 #else
 #include <GL/gl.h>
 #endif
diff --git a/backends/graphics/opengl/gltexture.h b/backends/graphics/opengl/gltexture.h
index 92bd0ec8d9e..e7951a0c969 100644
--- a/backends/graphics/opengl/gltexture.h
+++ b/backends/graphics/opengl/gltexture.h
@@ -32,10 +32,10 @@
 #undef ARRAYSIZE
 #endif
 
-#if defined(SDL_BACKEND)
-#include <SDL_opengl.h>
-#elif defined(USE_GLES)
+#if defined(USE_GLES)
 #include <GLES/gl.h>
+#elif defined(SDL_BACKEND)
+#include <SDL_opengl.h>
 #else
 #include <GL/gl.h>
 #endif
diff --git a/backends/graphics/opengl/opengl-graphics.cpp b/backends/graphics/opengl/opengl-graphics.cpp
index 35dd9a60463..e2f8dd4d304 100644
--- a/backends/graphics/opengl/opengl-graphics.cpp
+++ b/backends/graphics/opengl/opengl-graphics.cpp
@@ -1043,7 +1043,7 @@ void OpenGLGraphicsManager::initGL() {
 	glMatrixMode(GL_PROJECTION); CHECK_GL_ERROR();
 	glLoadIdentity(); CHECK_GL_ERROR();
 #ifdef USE_GLES
-	glOrthox(0, _videoMode.hardwareWidth, _videoMode.hardwareHeight, 0, -1, 1); CHECK_GL_ERROR();
+	glOrthof(0, _videoMode.hardwareWidth, _videoMode.hardwareHeight, 0, -1, 1); CHECK_GL_ERROR();
 #else
 	glOrtho(0, _videoMode.hardwareWidth, _videoMode.hardwareHeight, 0, -1, 1); CHECK_GL_ERROR();
 #endif
diff --git a/backends/graphics/openglsdl/openglsdl-graphics.h b/backends/graphics/openglsdl/openglsdl-graphics.h
index 548988e43ae..d39c0814de6 100644
--- a/backends/graphics/openglsdl/openglsdl-graphics.h
+++ b/backends/graphics/openglsdl/openglsdl-graphics.h
@@ -30,7 +30,6 @@
 #if defined(ARRAYSIZE) && !defined(_WINDOWS_)
 #undef ARRAYSIZE
 #endif
-#include <SDL_opengl.h>
 
 #include "backends/graphics/opengl/opengl-graphics.h"