diff --git a/hw/kdrive/ephyr/ephyr.h b/hw/kdrive/ephyr/ephyr.h
index 5d58a216c..b72793199 100644
--- a/hw/kdrive/ephyr/ephyr.h
+++ b/hw/kdrive/ephyr/ephyr.h
@@ -33,6 +33,7 @@
 #include "os.h"  		/* for OsSignal() */
 #include "kdrive.h"
 #include "hostx.h"
+#define EXA_DRIVER_KNOWN_MAJOR 3
 #include "exa.h"
 
 #ifdef RANDR