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-rw-r--r--include/hw/char/imx_serial.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/char/imx_serial.h b/include/hw/char/imx_serial.h
index ee80da12e6..c8b74284f8 100644
--- a/include/hw/char/imx_serial.h
+++ b/include/hw/char/imx_serial.h
@@ -68,6 +68,7 @@
 #define UCR2_RXEN       (1<<1)    /* Receiver enable */
 #define UCR2_SRST       (1<<0)    /* Reset complete */
 
+#define UCR4_DREN       BIT(0)    /* Receive Data Ready interrupt enable */
 #define UCR4_TCEN       BIT(3)    /* TX complete interrupt enable */
 
 #define UTS1_TXEMPTY    (1<<6)