diff --git a/news/3351.bugfix.rst b/news/3351.bugfix.rst
new file mode 100644
index 00000000..d2d9c675
--- /dev/null
+++ b/news/3351.bugfix.rst
@@ -0,0 +1 @@
+Fix a bug that ``--site-packages`` flag is not recognized.
diff --git a/pipenv/cli/command.py b/pipenv/cli/command.py
index ae7111f1..ec1bef61 100644
--- a/pipenv/cli/command.py
+++ b/pipenv/cli/command.py
@@ -70,7 +70,6 @@ def cli(
     python=False,
     help=False,
     py=False,
-    site_packages=False,
     envs=False,
     man=False,
     completion=False,
@@ -198,7 +197,7 @@ def cli(
                 )
                 ctx.abort()
     # --two / --three was passed…
-    if (state.python or state.three is not None) or site_packages:
+    if (state.python or state.three is not None) or state.site_packages:
         ensure_project(
             three=state.three,
             python=state.python,
diff --git a/tests/integration/test_cli.py b/tests/integration/test_cli.py
index 946b98f7..a38883e0 100644
--- a/tests/integration/test_cli.py
+++ b/tests/integration/test_cli.py
@@ -41,6 +41,20 @@ def test_pipenv_py(PipenvInstance):
         assert os.path.basename(python).startswith('python')
 
 
+@pytest.mark.cli
+def test_pipenv_site_packages(PipenvInstance):
+    with PipenvInstance() as p:
+        c = p.pipenv('--python python --site-packages')
+        assert c.return_code == 0
+        assert 'Making site-packages available' in c.err
+        
+        # no-global-site-packages.txt under stdlib dir should not exist.
+        c = p.pipenv('run python -c "import sysconfig; print(sysconfig.get_path(\'stdlib\'))"')
+        assert c.return_code == 0
+        stdlib_path = c.out.strip()
+        assert not os.path.isfile(os.path.join(stdlib_path, 'no-global-site-packages.txt'))
+
+
 @pytest.mark.cli
 def test_pipenv_support(PipenvInstance):
     with PipenvInstance() as p: