diff --git a/hw/kdrive/ephyr/ephyr.c b/hw/kdrive/ephyr/ephyr.c
index 40c7fc8fa..7958cf7fc 100644
--- a/hw/kdrive/ephyr/ephyr.c
+++ b/hw/kdrive/ephyr/ephyr.c
@@ -1305,13 +1305,13 @@ MouseFini(KdPointerInfo * pi)
     ephyrMouse = NULL;
 }
 
+/* *must not* be const/readonly, because some fields are written later */
 KdPointerDriver EphyrMouseDriver = {
-    "ephyr",
-    MouseInit,
-    MouseEnable,
-    MouseDisable,
-    MouseFini,
-    NULL,
+    .name = "ephyr",
+    .Init = MouseInit,
+    .Enable = MouseEnable,
+    .Disable = MouseDisable,
+    .Fini = MouseFini,
 };
 
 /* Keyboard */
@@ -1378,13 +1378,13 @@ EphyrKeyboardBell(KdKeyboardInfo * ki, int volume, int frequency, int duration)
 {
 }
 
+/* *must not* be const/readonly, because some fields are written later */
 KdKeyboardDriver EphyrKeyboardDriver = {
-    "ephyr",
-    EphyrKeyboardInit,
-    EphyrKeyboardEnable,
-    EphyrKeyboardLeds,
-    EphyrKeyboardBell,
-    EphyrKeyboardDisable,
-    EphyrKeyboardFini,
-    NULL,
+    .name = "ephyr",
+    .Init = EphyrKeyboardInit,
+    .Enable = EphyrKeyboardEnable,
+    .Leds = EphyrKeyboardLeds,
+    .Bell = EphyrKeyboardBell,
+    .Disable = EphyrKeyboardDisable,
+    .Fini = EphyrKeyboardFini,
 };