diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index 34a7993a314..375eb4e0650 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -147,6 +147,7 @@ TODO: document the other workarounds.
         <application name="Divinity: Original Sin Enhanced Edition" executable="EoCApp">
             <option name="allow_glsl_extension_directive_midshader" value="true" />
             <option name="glsl_correct_derivatives_after_discard" value="true" />
+            <option name="force_gl_vendor" value="ATI Technologies, Inc."/>
         </application>
 
         <application name="Metro 2033 Redux / Metro Last Night Redux" executable="metro">