diff --git a/src/OpenGL/compiler/Compiler.h b/src/OpenGL/compiler/Compiler.h
index 89acc04..c778626 100644
--- a/src/OpenGL/compiler/Compiler.h
+++ b/src/OpenGL/compiler/Compiler.h
@@ -67,29 +67,6 @@
 #define GL_FRAGMENT_SHADER                0x8B30
 #define GL_VERTEX_SHADER                  0x8B31
 
-// Note: GL_ARB_texture_rectangle is part of gl2extchromium.h in the Chromium repo
-// GL_ARB_texture_rectangle
-#ifndef GL_ARB_texture_rectangle
-#define GL_ARB_texture_rectangle 1
-
-#ifndef GL_SAMPLER_2D_RECT_ARB
-#define GL_SAMPLER_2D_RECT_ARB 0x8B63
-#endif
-
-#ifndef GL_TEXTURE_BINDING_RECTANGLE_ARB
-#define GL_TEXTURE_BINDING_RECTANGLE_ARB 0x84F6
-#endif
-
-#ifndef GL_TEXTURE_RECTANGLE_ARB
-#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
-#endif
-
-#ifndef GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB
-#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
-#endif
-
-#endif  // GL_ARB_texture_rectangle
-
 //
 // The base class for the machine dependent compiler to derive from
 // for managing object code from the compile.
diff --git a/src/OpenGL/compiler/OutputASM.cpp b/src/OpenGL/compiler/OutputASM.cpp
index 8b20758..9ed34b2 100644
--- a/src/OpenGL/compiler/OutputASM.cpp
+++ b/src/OpenGL/compiler/OutputASM.cpp
@@ -23,6 +23,8 @@
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES3/gl3.h>
+#include <GL/glcorearb.h>
+#include <GL/glext.h>
 
 #include <stdlib.h>
 
diff --git a/src/OpenGL/libGLESv2/Renderbuffer.cpp b/src/OpenGL/libGLESv2/Renderbuffer.cpp
index 48a61e9..a970dcf 100644
--- a/src/OpenGL/libGLESv2/Renderbuffer.cpp
+++ b/src/OpenGL/libGLESv2/Renderbuffer.cpp
@@ -22,8 +22,6 @@
 #include "Texture.h"
 #include "utilities.h"
 
-#include "compiler/Compiler.h"
-
 namespace es2
 {
 RenderbufferInterface::RenderbufferInterface()
diff --git a/src/OpenGL/libGLESv2/utilities.h b/src/OpenGL/libGLESv2/utilities.h
index 321dbc8..f0fdb4b 100644
--- a/src/OpenGL/libGLESv2/utilities.h
+++ b/src/OpenGL/libGLESv2/utilities.h
@@ -23,6 +23,8 @@
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
+#include <GL/glcorearb.h>
+#include <GL/glext.h>
 
 #include <string>
 
diff --git a/tests/unittests/unittests.cpp b/tests/unittests/unittests.cpp
index d75d9ba..89a24a0 100644
--- a/tests/unittests/unittests.cpp
+++ b/tests/unittests/unittests.cpp
@@ -19,6 +19,8 @@
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES3/gl3.h>
+#include <GL/glcorearb.h>
+#include <GL/glext.h>
 
 #if defined(_WIN32)
 #include <Windows.h>
@@ -636,29 +638,6 @@
 	}
 }
 
-// Note: GL_ARB_texture_rectangle is part of gl2extchromium.h in the Chromium repo
-// GL_ARB_texture_rectangle
-#ifndef GL_ARB_texture_rectangle
-#define GL_ARB_texture_rectangle 1
-
-#ifndef GL_SAMPLER_2D_RECT_ARB
-#define GL_SAMPLER_2D_RECT_ARB 0x8B63
-#endif
-
-#ifndef GL_TEXTURE_BINDING_RECTANGLE_ARB
-#define GL_TEXTURE_BINDING_RECTANGLE_ARB 0x84F6
-#endif
-
-#ifndef GL_TEXTURE_RECTANGLE_ARB
-#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
-#endif
-
-#ifndef GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB
-#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
-#endif
-
-#endif  // GL_ARB_texture_rectangle
-
 // Test using TexImage2D to define a rectangle texture
 
 TEST_F(SwiftShaderTest, TextureRectangle_TexImage2D)