diff --git a/lib/krb5/kcm.h b/lib/krb5/kcm.h
index 3588d8312..d9948b5d9 100644
--- a/lib/krb5/kcm.h
+++ b/lib/krb5/kcm.h
@@ -37,7 +37,7 @@
  * KCM protocol definitions
  */
 
-#define KCM_PROTOCOL_VERSION_MAJOR	1
+#define KCM_PROTOCOL_VERSION_MAJOR	2
 #define KCM_PROTOCOL_VERSION_MINOR	0
 
 typedef enum kcm_operation {