diff --git a/agent/consul/fsm/commands_oss.go b/agent/consul/fsm/commands_oss.go
index d556599a2f..d06219609e 100644
--- a/agent/consul/fsm/commands_oss.go
+++ b/agent/consul/fsm/commands_oss.go
@@ -462,7 +462,7 @@ func (c *FSM) applyConnectCAOperation(buf []byte, index uint64) interface{} {
 			return act
 		}
 
-		act, err = c.state.CACheckAndSetConfig(index+1, req.Config.ModifyIndex, req.Config)
+		act, err = c.state.CACheckAndSetConfig(index, req.Config.ModifyIndex, req.Config)
 		if err != nil {
 			return err
 		}