1 files changed, 2 insertions, 2 deletions
diff --git a/nx-X11/programs/Xserver/include/os.h b/nx-X11/programs/Xserver/include/os.h
index 6e629c42f..26ce2706c 100644
--- a/nx-X11/programs/Xserver/include/os.h
+++ b/nx-X11/programs/Xserver/include/os.h
@@ -124,7 +124,7 @@ extern void FlushIfCriticalOutputPending(void);
 
 extern void SetCriticalOutputPending(void);
 
-extern int WriteToClient(ClientPtr /*who*/, int /*count*/, char* /*buf*/);
+extern int WriteToClient(ClientPtr /*who*/, int /*count*/, const void* /*__buf*/);
 
 extern void ResetOsBuffers(void);
 
@@ -444,7 +444,7 @@ typedef struct {
 extern CallbackListPtr ReplyCallback;
 typedef struct {
     ClientPtr client;
-    void * replyData;
+    const void * replyData;
     unsigned long dataLenBytes;
     unsigned long bytesRemaining;
     Bool startOfReply;