diff --git a/src/mouse.c b/src/mouse.c
index d2377ad..6fa76c0 100644
--- a/src/mouse.c
+++ b/src/mouse.c
@@ -944,6 +944,10 @@ MousePreInit(InputDriverPtr drv, InputInfoPtr pInfo, int flags)
 
     protocol = MousePickProtocol(pInfo, device, protocol, &protocolID);
 
+    if (protocolID == PROT_UNKNOWN &&
+        osInfo->CheckProtocol && osInfo->CheckProtocol(protocol))
+        goto out;
+
     if (!device)
         MouseFindDevice(pInfo, protocol);