diff --git a/Xi/exevents.c b/Xi/exevents.c
index 053c76f22..edf2c393f 100644
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@@ -1495,7 +1495,7 @@ GrabKey(ClientPtr client, DeviceIntPtr dev, DeviceIntPtr modifier_device,
     rc = CheckGrabValues(client, param);
     if (rc != Success)
         return rc;
-    if (k == NULL)
+    if ((dev->id != XIAllDevices && dev->id != XIAllMasterDevices) && k == NULL)
 	return BadMatch;
     if (grabtype == GRABTYPE_XI)
     {