diff --git a/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch
index 5d5f99e1ed..cb58e16a06 100644
--- a/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch
+++ b/target/linux/ramips/patches-3.18/0048-GPIO-ralink-add-mt7621-gpio-controller.patch
@@ -250,7 +250,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +		pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
 +
 +		for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
-+			u32 map = irq_find_mapping(mediatek_gpio_irq_domain, bit);
++			u32 map = irq_find_mapping(mediatek_gpio_irq_domain, (MTK_BANK_WIDTH * i) + bit);
 +
 +			generic_handle_irq(map);
 +			mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));