diff --git a/devices/qemu-aarch64/default.nix b/devices/qemu-aarch64/default.nix
index 63976da6..ea0ccfe2 100644
--- a/devices/qemu-aarch64/default.nix
+++ b/devices/qemu-aarch64/default.nix
@@ -37,7 +37,6 @@
         VIRTIO_BLK = "y";
         VIRTIO_NET = "y";
 
-        SERIAL_EARLYCON_ARM_SEMIHOST = "y"; # earlycon=smh
         SERIAL_AMBA_PL011 = "y";
         SERIAL_AMBA_PL011_CONSOLE = "y";
       };
diff --git a/devices/qemu-armv7l/default.nix b/devices/qemu-armv7l/default.nix
index 149f7935..b06fbc25 100644
--- a/devices/qemu-armv7l/default.nix
+++ b/devices/qemu-armv7l/default.nix
@@ -40,7 +40,6 @@
         VIRTIO_BLK = "y";
         VIRTIO_NET = "y";
 
-        SERIAL_EARLYCON_ARM_SEMIHOST = "y"; # earlycon=smh
         SERIAL_AMBA_PL011 = "y";
         SERIAL_AMBA_PL011_CONSOLE = "y";
       };