diff --git a/Xext/namespace/namespace.h b/Xext/namespace/namespace.h
index 36331df192..f0ce94761a 100644
--- a/Xext/namespace/namespace.h
+++ b/Xext/namespace/namespace.h
@@ -12,7 +12,7 @@
 
 struct auth_token {
     struct xorg_list entry;
-    const char *authProto;
+    char *authProto;
     char *authTokenData;
     size_t authTokenLen;
     XID authId;