diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 1fdc6bc960e..60b53e9a1e6 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -366,9 +366,9 @@ class Obj2ModVisitor(PickleVisitor):
         self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
         self.emit("{", 0)
         self.emit("PyObject* tmp = NULL;", 1)
+        self.emit("int isinstance;", 1)
         # Prevent compiler warnings about unused variable.
         self.emit("tmp = tmp;", 1)
-        self.emit("int isinstance;", 1)
         self.emit("", 0)
 
     def sumTrailer(self, name, add_label=False):
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 7f22f7f5c3e..8de5314e2d8 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -3375,8 +3375,8 @@ int
 obj2ast_mod(PyObject* obj, mod_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
 
         if (obj == Py_None) {
@@ -3524,8 +3524,8 @@ int
 obj2ast_stmt(PyObject* obj, stmt_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         int lineno;
         int col_offset;
@@ -4720,8 +4720,8 @@ int
 obj2ast_expr(PyObject* obj, expr_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         int lineno;
         int col_offset;
@@ -5836,8 +5836,8 @@ int
 obj2ast_expr_context(PyObject* obj, expr_context_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         isinstance = PyObject_IsInstance(obj, (PyObject *)Load_type);
         if (isinstance == -1) {
@@ -5896,8 +5896,8 @@ int
 obj2ast_slice(PyObject* obj, slice_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
 
         if (obj == Py_None) {
@@ -6019,8 +6019,8 @@ int
 obj2ast_boolop(PyObject* obj, boolop_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         isinstance = PyObject_IsInstance(obj, (PyObject *)And_type);
         if (isinstance == -1) {
@@ -6047,8 +6047,8 @@ int
 obj2ast_operator(PyObject* obj, operator_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         isinstance = PyObject_IsInstance(obj, (PyObject *)Add_type);
         if (isinstance == -1) {
@@ -6155,8 +6155,8 @@ int
 obj2ast_unaryop(PyObject* obj, unaryop_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         isinstance = PyObject_IsInstance(obj, (PyObject *)Invert_type);
         if (isinstance == -1) {
@@ -6199,8 +6199,8 @@ int
 obj2ast_cmpop(PyObject* obj, cmpop_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         isinstance = PyObject_IsInstance(obj, (PyObject *)Eq_type);
         if (isinstance == -1) {
@@ -6355,8 +6355,8 @@ int
 obj2ast_excepthandler(PyObject* obj, excepthandler_ty* out, PyArena* arena)
 {
         PyObject* tmp = NULL;
-        tmp = tmp;
         int isinstance;
+        tmp = tmp;
 
         int lineno;
         int col_offset;