diff --git a/target/linux/brcm-2.6/patches/001-bcm947xx.patch b/target/linux/brcm-2.6/patches/001-bcm947xx.patch
index 8c077adce8..e180e4718f 100644
--- a/target/linux/brcm-2.6/patches/001-bcm947xx.patch
+++ b/target/linux/brcm-2.6/patches/001-bcm947xx.patch
@@ -11639,7 +11639,7 @@ diff -urN linux.old/arch/mips/bcm947xx/setup.c linux.dev/arch/mips/bcm947xx/setu
 +	s.membase = regs;
 +	s.irq = irq + 2;
 +	s.uartclk = baud_base;
-+	s.flags = ASYNC_BOOT_AUTOCONF;
++	s.flags = ASYNC_BOOT_AUTOCONF | UPF_SHARE_IRQ;
 +	s.iotype = SERIAL_IO_MEM;
 +	s.regshift = reg_shift;
 +