diff --git a/src/common.h b/src/common.h
index e15ef490..90e404fa 100644
--- a/src/common.h
+++ b/src/common.h
@@ -1,13 +1,5 @@
 #pragma once
 
-#ifdef _MSC_VER
-#pragma warning (disable:4267)
-#pragma warning (disable:4101)
-#pragma warning (disable:4244)
-#define _CRT_NONSTDC_NO_DEPRECATE
-#define strdup _strdup
-#endif
-
 #include <cmath>
 #include <cstring>
 
@@ -29,16 +21,14 @@
 #include <variant>
 #include <type_traits>
 
-#include "config.h"
-
 #define PK_VERSION				"1.0.3"
 
-/*******************************************************************************/
+#include "config.h"
 
+/*******************************************************************************/
 #if PK_ENABLE_STD_FUNCTION
 #include <functional>
 #endif
-
 /*******************************************************************************/
 
 #if PK_ENABLE_THREAD
@@ -57,20 +47,6 @@ struct GIL {
 #define GLOBAL_SCOPE_LOCK()
 #endif
 
-/*******************************************************************************/
-#if _MSC_VER
-#define PK_ENABLE_COMPUTED_GOTO		0
-#define UNREACHABLE()				__assume(0)
-#else
-#define PK_ENABLE_COMPUTED_GOTO		1
-#define UNREACHABLE()				__builtin_unreachable()
-
-#if DEBUG_CEVAL_STEP
-#undef PK_ENABLE_COMPUTED_GOTO
-#endif
-
-#endif
-
 /*******************************************************************************/
 
 namespace pkpy{
diff --git a/src/config.h b/src/config.h
index 4617a93d..db841f39 100644
--- a/src/config.h
+++ b/src/config.h
@@ -21,6 +21,21 @@
 // but it's slower and may cause severe "code bloat", also needs more time to compile.
 #define PK_ENABLE_STD_FUNCTION      0
 
+/*************** debug settings ***************/
+
+// Enable this may help you find bugs
+#define DEBUG_EXTRA_CHECK           0
+
+// Do not edit the following settings unless you know what you are doing
+#define DEBUG_NO_BUILTIN_MODULES    0
+#define DEBUG_DIS_EXEC              0
+#define DEBUG_CEVAL_STEP            0
+#define DEBUG_FULL_EXCEPTION        0
+#define DEBUG_MEMORY_POOL           0
+#define DEBUG_NO_MEMORY_POOL        0
+#define DEBUG_NO_AUTO_GC            0
+#define DEBUG_GC_STATS              0
+
 /*************** internal settings ***************/
 
 // This is the maximum size of the value stack in void* units
@@ -44,19 +59,25 @@ inline const float kTypeAttrLoadFactor = 0.5f;
     inline const char kPlatformSep = '/';
 #endif
 
-/*************** debug settings ***************/
+#ifdef _MSC_VER
+#pragma warning (disable:4267)
+#pragma warning (disable:4101)
+#pragma warning (disable:4244)
+#define _CRT_NONSTDC_NO_DEPRECATE
+#define strdup _strdup
+#endif
 
-// Enable this may help you find bugs
-#define DEBUG_EXTRA_CHECK           0
+#ifdef _MSC_VER
+#define PK_ENABLE_COMPUTED_GOTO		0
+#define UNREACHABLE()				__assume(0)
+#else
+#define PK_ENABLE_COMPUTED_GOTO		1
+#define UNREACHABLE()				__builtin_unreachable()
+#endif
 
-// Do not edit the following settings unless you know what you are doing
-#define DEBUG_NO_BUILTIN_MODULES    0
-#define DEBUG_DIS_EXEC              0
-#define DEBUG_CEVAL_STEP            0
-#define DEBUG_FULL_EXCEPTION        0
-#define DEBUG_MEMORY_POOL           0
-#define DEBUG_NO_MEMORY_POOL        0
-#define DEBUG_NO_AUTO_GC            0
-#define DEBUG_GC_STATS              0
+
+#if DEBUG_CEVAL_STEP && defined(PK_ENABLE_COMPUTED_GOTO)
+#undef PK_ENABLE_COMPUTED_GOTO
+#endif
 
 #endif
\ No newline at end of file
diff --git a/src/vm.h b/src/vm.h
index 1d246222..f50d7dd0 100644
--- a/src/vm.h
+++ b/src/vm.h
@@ -1513,7 +1513,7 @@ PyObject* PyArrayGetItem(VM* vm, PyObject* obj, PyObject* index){
     static_assert(std::is_same_v<T, List> || std::is_same_v<T, Tuple>);
     const T& self = _CAST(T&, obj);
 
-    if(is_type(index, vm->tp_slice)){
+    if(is_non_tagged_type(index, vm->tp_slice)){
         const Slice& s = _CAST(Slice&, index);
         int start, stop, step;
         vm->parse_int_slice(s, self.size(), start, stop, step);