diff --git a/transport/internet/kcp/xor_amd64.s b/transport/internet/kcp/xor_amd64.s
index d5b0f483..0c2759d7 100644
--- a/transport/internet/kcp/xor_amd64.s
+++ b/transport/internet/kcp/xor_amd64.s
@@ -3,7 +3,7 @@
 // func xorfwd(x []byte)
 TEXT ·xorfwd(SB),NOSPLIT,$0
   MOVQ x+0(FP), SI  // x[i]
-  MOVL x_len+8(FP), CX  // x.len
+  MOVQ x_len+8(FP), CX  // x.len
   MOVQ x+0(FP), DI
   ADDQ $4, DI       // x[i+4]
   SUBQ $4, CX
@@ -24,7 +24,7 @@ xorfwddone:
 // func xorbkd(x []byte)
 TEXT ·xorbkd(SB),NOSPLIT,$0
   MOVQ x+0(FP), SI
-  MOVL x_len+8(FP), CX  // x.len
+  MOVQ x_len+8(FP), CX  // x.len
   MOVQ x+0(FP), DI
   ADDQ CX, SI       // x[-8]
   SUBQ $8, SI
diff --git a/v2ray.go b/v2ray.go
index ce073843..ffbb0a56 100644
--- a/v2ray.go
+++ b/v2ray.go
@@ -69,7 +69,7 @@ func newSimpleServer(config *Config) (*simpleServer, error) {
 		if err != nil {
 			return nil, newError("failed apply default log settings").Base(err)
 		}
-		space.AddApplication(l)
+		common.Must(space.AddApplication(l))
 	}
 
 	outboundHandlerManager := proxyman.OutboundHandlerManagerFromSpace(space)
@@ -115,7 +115,7 @@ func newSimpleServer(config *Config) (*simpleServer, error) {
 		if err != nil {
 			return nil, err
 		}
-		space.AddApplication(d)
+		common.Must(space.AddApplication(d))
 		disp = d.(dispatcher.Interface)
 	}