--- DevIL.old/DevIL/src-ILUT/src/ilut_opengl.cpp
+++ DevIL/DevIL/src-ILUT/src/ilut_opengl.cpp
@@ -89,6 +89,8 @@
 	ILGLTEXSUBIMAGE3DARBPROC		ilGLTexSubImage3D = NULL;
 	ILGLCOMPRESSEDTEXIMAGE2DARBPROC	ilGLCompressed2D = NULL;
 	ILGLCOMPRESSEDTEXIMAGE3DARBPROC	ilGLCompressed3D = NULL;
+#else
+#error This should not happen
 #endif
 
 
--- DevIL.old/DevIL/src-ILUT/include/ilut_opengl.h
+++ DevIL/DevIL/src-ILUT/include/ilut_opengl.h
@@ -42,6 +42,6 @@
 typedef void (ILAPIENTRY * ILGLCOMPRESSEDTEXIMAGE2DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *data);
 typedef void (ILAPIENTRY * ILGLCOMPRESSEDTEXIMAGE3DARBPROC) (GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const GLvoid *data);
 
-
+#define linux 1
 #endif //ILUT_USE_OPENGL
 #endif //ILUT_OPENGL_H