diff --git a/opengl/include/EGL/eglext.h b/opengl/include/EGL/eglext.h
index 4569b87..4c4cd4e 100644
--- a/opengl/include/EGL/eglext.h
+++ b/opengl/include/EGL/eglext.h
@@ -704,6 +704,7 @@
 #define EGL_SMPTE2086_WHITE_POINT_Y_EXT   0x3348
 #define EGL_SMPTE2086_MAX_LUMINANCE_EXT   0x3349
 #define EGL_SMPTE2086_MIN_LUMINANCE_EXT   0x334A
+#define EGL_METADATA_SCALING_EXT          50000
 #endif /* EGL_EXT_surface_SMPTE2086_metadata */
 
 #ifdef __cplusplus
diff --git a/opengl/tools/glgen2/registry/egl.xml b/opengl/tools/glgen2/registry/egl.xml
index e5b374c..af13395 100755
--- a/opengl/tools/glgen2/registry/egl.xml
+++ b/opengl/tools/glgen2/registry/egl.xml
@@ -736,6 +736,7 @@
         <enum value="0x3348" name="EGL_SMPTE2086_WHITE_POINT_Y_EXT"/>
         <enum value="0x3349" name="EGL_SMPTE2086_MAX_LUMINANCE_EXT"/>
         <enum value="0x334A" name="EGL_SMPTE2086_MIN_LUMINANCE_EXT"/>
+        <enum value="50000"  name="EGL_METADATA_SCALING_EXT"/>
             <unused start="0x334B" end="0x334F"/>
         <enum value="0x3350" name="EGL_GL_COLORSPACE_SCRGB_LINEAR_EXT"/>
             <unused start="0x3351" end="0x339F"/>
@@ -1998,6 +1999,7 @@
                 <enum name="EGL_SMPTE2086_WHITE_POINT_Y_EXT"/>
                 <enum name="EGL_SMPTE2086_MAX_LUMINANCE_EXT"/>
                 <enum name="EGL_SMPTE2086_MIN_LUMINANCE_EXT"/>
+                <enum name="EGL_METADATA_SCALING_EXT"/>
             </require>
         </extension>