diff --git a/src/driver/tpax_driver_ctx.c b/src/driver/tpax_driver_ctx.c
index 4f533cc..7557ace 100644
--- a/src/driver/tpax_driver_ctx.c
+++ b/src/driver/tpax_driver_ctx.c
@@ -284,7 +284,11 @@ static struct tpax_driver_ctx_impl * tpax_driver_ctx_alloc(
 
 	if (cctx->drvflags & TPAX_DRIVER_EXEC_MODE_WRITE_COPY) {
 		ictx->ctx.bufsize = 64 * 1024;
-		ictx->ctx.bufaddr = mmap(0,ictx->ctx.bufsize,PROT_READ|PROT_WRITE,MAP_ANONYMOUS,-1,0);
+		ictx->ctx.bufaddr = mmap(
+			0,ictx->ctx.bufsize,
+			PROT_READ|PROT_WRITE,
+			MAP_PRIVATE|MAP_ANONYMOUS,
+			-1,0);
 	}
 
 	if (ictx->ctx.bufaddr == MAP_FAILED) {