diff --git a/sys/dev/i2c/gttwsi_core.c b/sys/dev/i2c/gttwsi_core.c
index 3cc09eb455b0..c76e20c011ac 100644
--- a/sys/dev/i2c/gttwsi_core.c
+++ b/sys/dev/i2c/gttwsi_core.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: gttwsi_core.c,v 1.15 2020/01/13 12:53:46 thorpej Exp $	*/
+/*	$NetBSD: gttwsi_core.c,v 1.16 2020/02/15 23:42:01 thorpej Exp $	*/
 /*
  * Copyright (c) 2008 Eiji Kawauchi.
  * All rights reserved.
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: gttwsi_core.c,v 1.15 2020/01/13 12:53:46 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: gttwsi_core.c,v 1.16 2020/02/15 23:42:01 thorpej Exp $");
 #include "locators.h"
 
 #include <sys/param.h>
@@ -317,6 +317,13 @@ gttwsi_wait(struct gttwsi_softc *sc, uint32_t control, uint32_t expect,
 	uint32_t status;
 	int timo, error = 0;
 
+	/*
+	 * XXX Interrupt-driven mode seems to be horribly broken,
+	 * XXX at least on AllWinner implementations.  Force polled
+	 * XXX mode for now.
+	 */
+	flags |= I2C_F_POLL;
+
 	DELAY(5);
 	if (!(flags & I2C_F_POLL))
 		control |= CONTROL_INTEN;