diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index 354042aad13..04047b330b4 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -159,10 +159,12 @@ TODO: document the other workarounds.
 
         <application name="RAGE (64-bit)" executable="Rage64.exe">
             <option name="allow_glsl_builtin_variable_redeclaration" value="true" />
+            <option name="force_gl_map_buffer_synchronized" value="true" />
         </application>
 
         <application name="RAGE (32-bit)" executable="Rage.exe">
             <option name="allow_glsl_builtin_variable_redeclaration" value="true" />
+            <option name="force_gl_map_buffer_synchronized" value="true" />
         </application>
 
         <application name="Second Life" executable="do-not-directly-run-secondlife-bin">