diff --git a/dix/getevents.c b/dix/getevents.c
index 62f3bcb7f..6969f782f 100644
--- a/dix/getevents.c
+++ b/dix/getevents.c
@@ -714,6 +714,7 @@ _X_EXPORT void
 SwitchCoreKeyboard(DeviceIntPtr pDev)
 {
     KeyClassPtr ckeyc = inputInfo.keyboard->key;
+    int i = 0;
 
     if (inputInfo.keyboard->devPrivates[CoreDevicePrivatesIndex].ptr != pDev) {
         memcpy(ckeyc->modifierMap, pDev->key->modifierMap, MAP_LENGTH);
@@ -728,6 +729,25 @@ SwitchCoreKeyboard(DeviceIntPtr pDev)
         ckeyc->curKeySyms.maxKeyCode = pDev->key->curKeySyms.maxKeyCode;
         SetKeySymsMap(&ckeyc->curKeySyms, &pDev->key->curKeySyms);
 
+        /*
+         * Copy state from the extended keyboard to core.  If you omit this,
+         * holding Ctrl on keyboard one, and pressing Q on keyboard two, will
+         * cause your app to quit.  This feels wrong to me, hence the below
+         * code.
+         *
+         * XXX: If you synthesise core modifier events, the state will get
+         *      clobbered here.  You'll have to work out something sensible
+         *      to fix that.  Good luck.
+         */
+
+#define KEYBOARD_MASK (ShiftMask | LockMask | ControlMask | Mod1Mask | \
+                       Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask)
+        ckeyc->state &= ~(KEYBOARD_MASK);
+        ckeyc->state |= (pDev->key->state & KEYBOARD_MASK);
+#undef KEYBOARD_MASK
+        for (i = 0; i < 8; i++)
+            ckeyc->modifierKeyCount[i] = pDev->key->modifierKeyCount[i];
+
 #ifdef XKB
         if (!noXkbExtension && pDev->key->xkbInfo && pDev->key->xkbInfo->desc) {
             if (!XkbCopyKeymap(pDev->key->xkbInfo->desc, ckeyc->xkbInfo->desc,