diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index e526380c259..3534d68a3df 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -370,6 +370,10 @@ TODO: document the other workarounds.
             <option name="glsl_correct_derivatives_after_discard" value="true" />
         </application>
 
+        <application name="Cossacks 3" executable="cossacks.exe">
+            <option name="allow_glsl_120_subset_in_110" value="true" />
+        </application>
+
         <application name="BETA CAE Systems - GL detect tool" executable="detect_opengl_tool">
             <option name="mesa_extension_override" value="-GL_MESA_pack_invert -GL_MESA_framebuffer_flip_y -GL_MESA_window_pos" />
         </application>