diff --git a/build/bakefiles/wxpresets/presets/wx_unix.bkl b/build/bakefiles/wxpresets/presets/wx_unix.bkl
index 4a0f195fe4..d08f13e52d 100644
--- a/build/bakefiles/wxpresets/presets/wx_unix.bkl
+++ b/build/bakefiles/wxpresets/presets/wx_unix.bkl
@@ -38,8 +38,9 @@ Format-specific notes:
     <!-- ============================================================== -->
 
     <if cond="FORMAT=='gnu'">
+        <set var="WX_CONFIG_DEFAULT" overwrite="0">wx-config</set>
         <option name="WX_CONFIG">
-            <default-value>wx-config</default-value>
+            <default-value>$(WX_CONFIG_DEFAULT)</default-value>
             <description>Location and arguments of wx-config script</description>
         </option>
         <option name="WX_CFLAGS">