diff --git a/internal/decoder/generic_amd64_go116.go b/internal/decoder/generic_amd64_go116.go
index b597043f9..8ce4bd880 100644
--- a/internal/decoder/generic_amd64_go116.go
+++ b/internal/decoder/generic_amd64_go116.go
@@ -645,7 +645,8 @@ func (self *_ValueDecoder) compile() {
     self.Emit("MOVQ", _R8, _VAR_cs_p)
     self.Emit("MOVQ", _AX, _VAR_cs_n)
     self.Emit("MOVQ", _DI, _VAR_cs_LR)
-    self.Emit("MOVQ", _T_byte, jit.Ptr(_SP, 0))
+    self.Emit("MOVQ", _T_byte, _R8)
+    self.Emit("MOVQ", _R8, jit.Ptr(_SP, 0))
     self.Emit("MOVQ", _AX, jit.Ptr(_SP, 8))
     self.Emit("MOVQ", _AX, jit.Ptr(_SP, 16))
     self.call_go(_F_makeslice)                              
diff --git a/internal/encoder/assembler_amd64_go116.go b/internal/encoder/assembler_amd64_go116.go
index d056259f2..40497d60b 100644
--- a/internal/encoder/assembler_amd64_go116.go
+++ b/internal/encoder/assembler_amd64_go116.go
@@ -579,7 +579,8 @@ var (
 
 func (self *_Assembler) more_space() {
     self.Link(_LB_more_space)
-    self.Emit("MOVQ", _T_byte, jit.Ptr(_SP, 0))     // MOVQ $_T_byte, (SP)
+    self.Emit("MOVQ", _T_byte, _AX)                 // MOVQ $_T_byte, _AX
+    self.Emit("MOVQ", _AX, jit.Ptr(_SP, 0))         // MOVQ _AX, (SP)
     self.Emit("MOVQ", _RP, jit.Ptr(_SP, 8))         // MOVQ RP, 8(SP)
     self.Emit("MOVQ", _RL, jit.Ptr(_SP, 16))        // MOVQ RL, 16(SP)
     self.Emit("MOVQ", _RC, jit.Ptr(_SP, 24))        // MOVQ RC, 24(SP)