diff --git a/extensions/EXT/EXT_depth_clamp.txt b/extensions/EXT/EXT_depth_clamp.txt
new file mode 100644
index 0000000..e54d7b7
--- /dev/null
+++ b/extensions/EXT/EXT_depth_clamp.txt
@@ -0,0 +1,148 @@
+Name
+
+    EXT_depth_clamp
+
+Name Strings
+
+    GL_EXT_depth_clamp
+
+Contact
+
+    Gert Wollny (gert.wollny 'at' collabora.com)
+
+Notice
+
+    Copyright (c) 2019 Collabora LTD 
+    Copyright (c) 2009-2013 The Khronos Group Inc. Copyright terms at
+        http://www.khronos.org/registry/speccopyright.html
+
+Status
+
+    FIXME
+
+Version
+
+    Version 1, 2019/01/24.
+    Based on ARB_depth_clamp version 4, modified 2009/08/02.
+
+Number
+
+    #309
+
+Dependencies
+
+    OpenGL ES 2.0 is required.
+    Written based on the wording of the OpenGL ES 3.2 specification.
+
+Overview
+
+    Conventional OpenGL clips geometric primitives to a clip volume
+    with six faces, two of which are the near and far clip planes.
+    Clipping to the near and far planes of the clip volume ensures that
+    interpolated depth values (after the depth range transform) must be
+    in the [0,1] range.
+
+    In some rendering applications such as shadow volumes, it is useful
+    to allow line and polygon primitives to be rasterized without
+    clipping the primitive to the near or far clip volume planes (side
+    clip volume planes clip normally).  Without the near and far clip
+    planes, rasterization (pixel coverage determination) in X and Y
+    can proceed normally if we ignore the near and far clip planes.
+    The one major issue is that fragments of a  primitive may extend
+    beyond the conventional window space depth range for depth values
+    (typically the range [0,1]).  Rather than discarding fragments that
+    defy the window space depth range (effectively what near and far
+    plane clipping accomplish), the depth values can be clamped to the
+    current depth range.
+
+    This extension provides exactly such functionality.  This
+    functionality is useful to obviate the need for near plane capping
+    of stenciled shadow volumes.  The functionality may also be useful
+    for rendering geometry "beyond" the far plane if an alternative
+    algorithm (rather than depth testing) for hidden surface removal is
+    applied to such geometry (specifically, the painter's algorithm).
+    Similar situations at the near clip plane can be avoided at the
+    near clip plane where apparently solid objects can be "seen through"
+    if they intersect the near clip plane.
+
+New Procedures and Functions
+
+    None
+
+New Tokens
+
+    Accepted by the <cap> parameter of Enable, Disable, and IsEnabled,
+    and by the <pname> parameter of GetBooleanv, GetIntegerv,
+    GetFloatv:
+
+        DEPTH_CLAMP_EXT                               0x864F
+
+Additions to Chapter 12 of the OpenGL ES 3.2 Specification (Fixed-Function Vertex Post-Processing)
+
+ --  Section 12.5 "Primitive Clipping"
+
+    Add to the end of the 1st paragraph:
+
+    "Depth clamping is enabled with the generic Enable command and
+    disabled with the Disable command. The value of the argument to
+    either command is DEPTH_CLAMP_EXT. If depth clamping is enabled, the
+    "-w_c <= z_c <= w_c" plane equation are ignored by view volume
+    clipping (effectively, there is no near or far plane clipping)."
+
+Additions to Chapter 15 of the OpenGL ES 3.2 Specification (Writing Fragments and Samples to the Framebuffer)
+
+ --  Section 15.1.3 "Depth buffer test"
+
+    Add to the end of the 2nd paragraph:
+
+    "If depth clamping (see section 12.15) is enabled, before the
+    incoming fragment's z_w is compared z_w is clamped to the range
+    [min(n,f),max(n,f)], where n and f are the current near and far
+    depth range values (see section 12.6.1)."
+
+Additions to the AGL/GLX/WGL Specifications
+
+    None
+
+GLX Protocol
+
+    None
+
+Errors
+
+    None
+
+New State
+
+Add to table 6.4, transformation state
+
+Get Value       Type  Get Command  Initial Value  Description     Sec    
+--------------  ----  -----------  -------------  --------------  ------ 
+DEPTH_CLAMP_EXT  B     IsEnabled    False          Depth clamping  12.5  
+                                                  on/off
+
+New Implementation Dependent State
+
+    None
+
+Issues
+
+    See the issue list in GL_ARB_depth_clamp.
+
+    Can fragments with w_c <=0 be generated when this extension is supported?
+ 
+      RESOLUTION: No. The inequalities in OpenGL ES Specification 12.5 clarify 
+      that only primitives that lie in the region w_c >= 0 can be produced by
+      clipping and the vertex normalization in 12.6 clarifies that values 
+      w_c = 0 are prohibited. Hence fragments with w_c <= 0 should also never
+      be generated when this extension is supported.
+
+    How does this extension differ from ARB_depth_clamp? 
+      
+      Instead of DEPTH_CLAMP the parameter is called DEPTH_CLAMP_EXT.
+      Push/pop attrib bits are not relevant for OpenGL ES. 
+
+Revision History
+
+    Version 1, 2019/01/25 (Gert Wollny) - rewrite ARB_depth_clamp against
+    OpenGL ES 3.2 instead of OpenGL 3.1.
diff --git a/extensions/esext.php b/extensions/esext.php
index e4967a9..b9056e8 100644
--- a/extensions/esext.php
+++ b/extensions/esext.php
@@ -641,4 +641,6 @@
 </li>
 <li value=308><a href="extensions/NV/NV_compute_shader_derivatives.txt">GL_NV_compute_shader_derivatives</a>
 </li>
+<li value=309><a href="extensions/EXT/EXT_depth_clamp.txt">GL_EXT_depth_clamp</a>
+</li>
 </ol>
diff --git a/extensions/registry.py b/extensions/registry.py
index 5fd7989..c8f9d26 100644
--- a/extensions/registry.py
+++ b/extensions/registry.py
@@ -1714,6 +1714,11 @@
         'supporters' : { 'NVIDIA' },
         'url' : 'extensions/EXT/EXT_depth_bounds_test.txt',
     },
+    'GL_EXT_depth_clamp' : {
+        'esnumber' : 309,
+        'flags' : { 'public' },
+        'url' : 'extensions/EXT/EXT_depth_clamp.txt',
+    },
     'GL_EXT_direct_state_access' : {
         'number' : 353,
         'flags' : { 'public' },
diff --git a/xml/gl.xml b/xml/gl.xml
index d9475aa..b68f7a2 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -6629,6 +6629,7 @@
         <enum value="0x864E" name="GL_DOT_PRODUCT_TEXTURE_RECTANGLE_NV"/>
         <enum value="0x864F" name="GL_DEPTH_CLAMP"/>
         <enum value="0x864F" name="GL_DEPTH_CLAMP_NV"/>
+        <enum value="0x864F" name="GL_DEPTH_CLAMP_EXT"/>
         <enum value="0x8650" name="GL_VERTEX_ATTRIB_ARRAY0_NV"/>
         <enum value="0x8651" name="GL_VERTEX_ATTRIB_ARRAY1_NV"/>
         <enum value="0x8652" name="GL_VERTEX_ATTRIB_ARRAY2_NV"/>
@@ -43308,6 +43309,11 @@
                 <command name="glDepthBoundsEXT"/>
             </require>
         </extension>
+        <extension name="GL_EXT_depth_clamp" supported="gles2">
+            <require>
+                <enum name="GL_DEPTH_CLAMP_EXT"/>
+            </require>
+        </extension>
         <extension name="GL_EXT_direct_state_access" supported="gl|glcore" comment="DSA extension doesn't identify which interfaces are core profile and keeps getting expanded. This is in sync with revision 34, 2010/09/07">
             <require>
                 <enum name="GL_PROGRAM_MATRIX_EXT"/>