diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 86e4eedf873..f884b28d673 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -411,11 +411,11 @@ class ModifiedInterpreter(InteractiveInterpreter):
         self.rpcclt.register("flist", self.tkconsole.flist)
         self.rpcclt.register("linecache", linecache)
         self.rpcclt.register("interp", self)
-        self.transfer_path()
+        self.transfer_path(with_cwd=True)
         self.poll_subprocess()
         return self.rpcclt
 
-    def restart_subprocess(self):
+    def restart_subprocess(self, with_cwd=False):
         if self.restarting:
             return self.rpcclt
         self.restarting = True
@@ -439,7 +439,7 @@ class ModifiedInterpreter(InteractiveInterpreter):
         except socket.timeout as err:
             self.display_no_subprocess_error()
             return None
-        self.transfer_path()
+        self.transfer_path(with_cwd=with_cwd)
         # annotate restart in shell window and mark it
         console.text.delete("iomark", "end-1c")
         if was_executing:
@@ -492,12 +492,18 @@ class ModifiedInterpreter(InteractiveInterpreter):
             except OSError:
                 return
 
-    def transfer_path(self):
+    def transfer_path(self, with_cwd=False):
+        if with_cwd:        # Issue 13506
+            path = ['']     # include Current Working Directory
+            path.extend(sys.path)
+        else:
+            path = sys.path
+
         self.runcommand("""if 1:
         import sys as _sys
         _sys.path = %r
         del _sys
-        \n""" % (sys.path,))
+        \n""" % (path,))
 
     active_seq = None
 
@@ -1191,7 +1197,8 @@ class PyShell(OutputWindow):
         self.text.see("restart")
 
     def restart_shell(self, event=None):
-        self.interp.restart_subprocess()
+        "Callback for Run/Restart Shell Cntl-F6"
+        self.interp.restart_subprocess(with_cwd=True)
 
     def showprompt(self):
         self.resetoutput()
diff --git a/Lib/idlelib/ScriptBinding.py b/Lib/idlelib/ScriptBinding.py
index 26becce0182..18ce9650aed 100644
--- a/Lib/idlelib/ScriptBinding.py
+++ b/Lib/idlelib/ScriptBinding.py
@@ -144,10 +144,9 @@ class ScriptBinding:
             return 'break'
         if not self.tabnanny(filename):
             return 'break'
-        shell = self.shell
-        interp = shell.interp
+        interp = self.shell.interp
         if PyShell.use_subprocess:
-            shell.restart_shell()
+            interp.restart_subprocess(with_cwd=False)
         dirname = os.path.dirname(filename)
         # XXX Too often this discards arguments the user just set...
         interp.runcommand("""if 1:
diff --git a/Misc/ACKS b/Misc/ACKS
index d49b85f3f93..aafb51ff6bf 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -880,6 +880,7 @@ Mark Sapiro
 Ty Sarna
 Ben Sayer
 sbt
+Marco Scataglini
 Andrew Schaaf
 Michael Scharf
 Andreas Schawo
diff --git a/Misc/NEWS b/Misc/NEWS
index 8b672574332..9ee1ce75840 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -463,6 +463,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #13506: Add '' to path for IDLE Shell when started and restarted with Restart Shell.
+  Original patches by Marco Scataglini and Roger Serwy.
+
 - Issue #8828: Add new function os.replace(), for cross-platform renaming
   with overwriting.
 
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 68929ba8d4f..f822f92d857 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -728,14 +728,15 @@ read_directory(PyObject *archive)
     PyObject *files = NULL;
     FILE *fp;
     unsigned short flags;
-    long compress, crc, data_size, file_size, file_offset, date, time;
-    long header_offset, name_size, header_size, header_position;
+    short compress, time, date, name_size;
+    long crc, data_size, file_size, header_size;
+    Py_ssize_t file_offset, header_position, header_offset;
     long l, count;
     Py_ssize_t i;
     char name[MAXPATHLEN + 5];
     PyObject *nameobj = NULL;
     char *p, endof_central_dir[22];
-    long arc_offset; /* offset from beginning of file to start of zip-archive */
+    Py_ssize_t arc_offset;  /* Absolute offset to start of the zip-archive. */
     PyObject *path;
     const char *charset;
     int bootstrap;
@@ -835,7 +836,7 @@ read_directory(PyObject *archive)
         path = PyUnicode_FromFormat("%U%c%U", archive, SEP, nameobj);
         if (path == NULL)
             goto error;
-        t = Py_BuildValue("Niiiiiii", path, compress, data_size,
+        t = Py_BuildValue("Nhllnhhl", path, compress, data_size,
                           file_size, file_offset, time, date, crc);
         if (t == NULL)
             goto error;