diff --git a/opengl/include/EGL/eglext.h b/opengl/include/EGL/eglext.h
index 32c21f6..c787fc9 100644
--- a/opengl/include/EGL/eglext.h
+++ b/opengl/include/EGL/eglext.h
@@ -699,7 +699,7 @@
 
 #ifndef EGL_EXT_gl_colorspace_bt2020_hlg
 #define EGL_EXT_gl_colorspace_bt2020_hlg 1
-#define EGL_GL_COLORSPACE_BT2020_HLG_EXT  0x333E
+#define EGL_GL_COLORSPACE_BT2020_HLG_EXT  0x3540
 #endif /* EGL_EXT_gl_colorspace_bt2020_hlg */
 
 #ifndef EGL_EXT_gl_colorspace_bt2020_linear