diff --git a/gst-libs/gst/gl/glprototypes/opengl.h b/gst-libs/gst/gl/glprototypes/opengl.h
index 24ba20d845..e8fbfbb575 100644
--- a/gst-libs/gst/gl/glprototypes/opengl.h
+++ b/gst-libs/gst/gl/glprototypes/opengl.h
@@ -57,6 +57,8 @@ GST_GL_EXT_FUNCTION (void, DepthRange,
                      (double near_val, double far_val))
 GST_GL_EXT_FUNCTION (void, DrawBuffer,
                      (GLenum mode))
+GST_GL_EXT_FUNCTION (void, ClearDepth,
+                     (GLclampd depth))
 GST_GL_EXT_END ()
 
 GST_GL_EXT_BEGIN (only_in_big_gl_compat,