diff --git a/Lib/macpath.py b/Lib/macpath.py
index ba9d40b..e3145da 100644
--- a/Lib/macpath.py
+++ b/Lib/macpath.py
@@ -7,7 +7,7 @@
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime", "islink","exists","isdir","isfile",
            "walk","expanduser","expandvars","normpath","abspath",
-           "supports_unicode_filenames"]
+           "realpath","supports_unicode_filenames"]
 
 # Normalize the case of a pathname.  Dummy in Posix, but <s>.lower() here.
 
diff --git a/Lib/ntpath.py b/Lib/ntpath.py
index d6b6920..b820514 100644
--- a/Lib/ntpath.py
+++ b/Lib/ntpath.py
@@ -13,7 +13,7 @@
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime", "islink","exists","isdir","isfile","ismount",
            "walk","expanduser","expandvars","normpath","abspath","splitunc",
-           "supports_unicode_filenames"]
+           "realpath","supports_unicode_filenames"]
 
 # Normalize the case of a pathname and map slashes to backslashes.
 # Other normalizations (such as optimizing '../' away) are not done
diff --git a/Lib/os2emxpath.py b/Lib/os2emxpath.py
index 0315da0..f92841f 100644
--- a/Lib/os2emxpath.py
+++ b/Lib/os2emxpath.py
@@ -12,7 +12,7 @@
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime", "islink","exists","isdir","isfile","ismount",
            "walk","expanduser","expandvars","normpath","abspath","splitunc",
-           "supports_unicode_filenames"]
+           "realpath","supports_unicode_filenames"]
 
 # Normalize the case of a pathname and map slashes to backslashes.
 # Other normalizations (such as optimizing '../' away) are not done
@@ -405,4 +405,7 @@
         path = join(os.getcwd(), path)
     return normpath(path)
 
+# realpath is a no-op on systems without islink support
+realpath = abspath
+
 supports_unicode_filenames = False
diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index 8da9fda..d0179f1 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -17,7 +17,8 @@
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime","islink","exists","isdir","isfile","ismount",
            "walk","expanduser","expandvars","normpath","abspath",
-           "samefile","sameopenfile","samestat","supports_unicode_filenames"]
+           "samefile","sameopenfile","samestat",
+           "realpath","supports_unicode_filenames"]
 
 # Normalize the case of a pathname.  Trivial in Posix, string.lower on Mac.
 # On MS-DOS this may also turn slashes into backslashes; however, other