diff --git a/src/obj.h b/src/obj.h
index da3f4e69..01e6d581 100644
--- a/src/obj.h
+++ b/src/obj.h
@@ -5,12 +5,7 @@
 typedef int64_t _Int;
 typedef double _Float;
 
-const _Int _Int_MAX_POS = 9223372036854775807LL;
-const _Int _Int_MAX_NEG = -9223372036854775807LL;
-const _Float _FLOAT_INF_POS = INFINITY;
-const _Float _FLOAT_INF_NEG = -INFINITY;
-
-#define PK_VERSION "0.3.7"
+#define PK_VERSION "0.3.8"
 
 class CodeObject;
 class BasePointer;
diff --git a/src/pocketpy.h b/src/pocketpy.h
index 38ea2b37..9eed130c 100644
--- a/src/pocketpy.h
+++ b/src/pocketpy.h
@@ -253,8 +253,8 @@ void __initializeBuiltinFunctions(VM* _vm) {
         if (args[0]->isType(vm->_tp_bool)) return vm->PyFloat(vm->PyBool_AS_C(args[0]) ? 1.0 : 0.0);
         if (args[0]->isType(vm->_tp_str)) {
             const _Str& s = vm->PyStr_AS_C(args[0]);
-            if(s == "inf") return vm->PyFloat(_FLOAT_INF_POS);
-            if(s == "-inf") return vm->PyFloat(_FLOAT_INF_NEG);
+            if(s == "inf") return vm->PyFloat(INFINITY);
+            if(s == "-inf") return vm->PyFloat(-INFINITY);
             try{
                 _Float val = std::stod(s.str());
                 return vm->PyFloat(val);
@@ -771,4 +771,9 @@ extern "C" {
     void pkpy_tvm_resume(ThreadedVM* vm, const char* value){
         vm->resume(value);
     }
+
+    __EXPORT
+    void pkpy_vm_keyboard_interrupt(VM* vm){
+        vm->keyboardInterrupt();
+    }
 }
\ No newline at end of file
diff --git a/src/vm.h b/src/vm.h
index 33cd9cbc..2c8483fe 100644
--- a/src/vm.h
+++ b/src/vm.h
@@ -51,17 +51,16 @@ protected:
     PyVar __py2py_call_signal;
     bool _stopFlag = false;
 
-    void emitKeyboardInterrupt(){
-        _stopFlag = true;
+    void _checkStopFlag(){
+        if(_stopFlag){
+            _stopFlag = false;
+            _error("KeyboardInterrupt", "");
+        }
     }
 
     PyVar runFrame(Frame* frame){
         while(!frame->isCodeEnd()){
-            if(_stopFlag){
-                _stopFlag = false;
-                _error("KeyboardInterrupt", "");
-            }
-
+            _checkStopFlag();
             const ByteCode& byte = frame->readCode();
             //printf("%s (%d) stack_size: %d\n", OP_NAMES[byte.op], byte.arg, frame->stackSize());
 
@@ -409,6 +408,10 @@ public:
         initializeBuiltinClasses();
     }
 
+    void keyboardInterrupt(){
+        _stopFlag = true;
+    }
+
     PyVar asStr(const PyVar& obj){
         PyVarOrNull str_fn = getAttr(obj, __str__, false);
         if(str_fn != nullptr) return call(str_fn, {});
@@ -1104,7 +1107,7 @@ class ThreadedVM : public VM {
 
     void __deleteThread(){
         if(_thread != nullptr){
-            emitKeyboardInterrupt();
+            keyboardInterrupt();
             _thread->join();
             delete _thread;
             _thread = nullptr;
@@ -1134,7 +1137,7 @@ public:
         _state = THREAD_SUSPENDED;
         // 50 fps is enough
         while(_state == THREAD_SUSPENDED){
-            if(_stopFlag) break;
+            _checkStopFlag();
             std::this_thread::sleep_for(std::chrono::milliseconds(20));
         }
     }