diff --git a/hw/smc91c111.c b/hw/smc91c111.c
index 36cb4ed74f..fe2389bf25 100644
--- a/hw/smc91c111.c
+++ b/hw/smc91c111.c
@@ -442,6 +442,7 @@ static void smc91c111_writeb(void *opaque, hwaddr offset,
             return;
         case 12: /* Early receive.  */
             s->ercv = value & 0x1f;
+            return;
         case 13:
             /* Ignore.  */
             return;