diff --git a/include/pocketpy/pocketpy.h b/include/pocketpy/pocketpy.h
index e436b547..9ad02efa 100644
--- a/include/pocketpy/pocketpy.h
+++ b/include/pocketpy/pocketpy.h
@@ -133,8 +133,8 @@ void py_setdict(py_Ref self, py_Name name, const py_Ref val);
 py_Ref py_getslot(const py_Ref self, int i);
 void py_setslot(py_Ref self, int i, const py_Ref val);
 
-py_Ref py_getupvalue(py_Ref self);
-void py_setupvalue(py_Ref self, const py_Ref val);
+py_Ref py_getupvalue(py_Ref argv);
+void py_setupvalue(py_Ref argv, const py_Ref val);
 
 /// Gets the attribute of the object.
 bool py_getattr(const py_Ref self, py_Name name, py_Ref out);
diff --git a/src/public/cast.c b/src/public/cast.c
index fede7ccc..2a949e28 100644
--- a/src/public/cast.c
+++ b/src/public/cast.c
@@ -22,9 +22,6 @@ bool py_castfloat(const py_Ref self, double* out){
         case tp_float:
             *out = self->_f64;
             return true;
-        case tp_bool:
-            *out = self->extra;
-            return true;
         default:
             return false;
     }