diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index e251e254af..87d4084f31 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -576,6 +576,18 @@ class AST_Tests(unittest.TestCase):
         with support.swap_attr(unicodedata, 'normalize', bad_normalize):
             self.assertRaises(TypeError, ast.parse, '\u03D5')
 
+    def test_issue18374_binop_col_offset(self):
+        tree = ast.parse('4+5+6+7')
+        parent_binop = tree.body[0].value
+        child_binop = parent_binop.left
+        grandchild_binop = child_binop.left
+        self.assertEqual(parent_binop.col_offset, 0)
+        self.assertEqual(parent_binop.end_col_offset, 7)
+        self.assertEqual(child_binop.col_offset, 0)
+        self.assertEqual(child_binop.end_col_offset, 5)
+        self.assertEqual(grandchild_binop.col_offset, 0)
+        self.assertEqual(grandchild_binop.end_col_offset, 3)
+
 
 class ASTHelpers_Test(unittest.TestCase):
     maxDiff = None
diff --git a/Python/ast.c b/Python/ast.c
index 16895ce62e..8dc86c23d6 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -2645,7 +2645,7 @@ ast_for_binop(struct compiling *c, const node *n)
             return NULL;
 
         tmp_result = BinOp(result, newoperator, tmp,
-                           LINENO(next_oper), next_oper->n_col_offset,
+                           LINENO(n), n->n_col_offset,
                            CHILD(n, i * 2 + 2)->n_end_lineno,
                            CHILD(n, i * 2 + 2)->n_end_col_offset,
                            c->c_arena);