diff --git a/news/4828.bugfix.rst b/news/4828.bugfix.rst
new file mode 100644
index 0000000000..ce5559a2d6
--- /dev/null
+++ b/news/4828.bugfix.rst
@@ -0,0 +1 @@
+Fix a regression that ``pipenv shell`` fails to start a subshell.
diff --git a/pipenv/core.py b/pipenv/core.py
index 5fcd82e39f..8d8170eef8 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -2306,7 +2306,7 @@ def do_shell(project, three=None, python=False, fancy=False, shell_args=None, py
 
     from .shells import choose_shell
 
-    shell = choose_shell()
+    shell = choose_shell(project)
     click.echo(fix_utf8("Launching subshell in virtual environment..."), err=True)
 
     fork_args = (
diff --git a/pipenv/shells.py b/pipenv/shells.py
index ed8cb9ad6f..a2f4b52e32 100644
--- a/pipenv/shells.py
+++ b/pipenv/shells.py
@@ -232,8 +232,8 @@ def _detect_emulator():
 
 
 def choose_shell(project):
-    emulator = project.PIPENV_EMULATOR.lower() or _detect_emulator()
-    type_, command = project.detect_info()
+    emulator = project.s.PIPENV_EMULATOR.lower() or _detect_emulator()
+    type_, command = detect_info(project)
     shell_types = SHELL_LOOKUP[type_]
     for key in emulator.split(","):
         key = key.strip().lower()