diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for hpath-filepath
 
+## 0.10.2 -- 2020-01-18
+
+* Add `isSpecialDirectoryEntry`
+
 ## 0.10.0 -- 2020-01-04
 
 * First version. Split from 'hpath', contains only the filepath ByteString manipulation parts.
diff --git a/hpath-filepath.cabal b/hpath-filepath.cabal
--- a/hpath-filepath.cabal
+++ b/hpath-filepath.cabal
@@ -1,5 +1,5 @@
 name:                hpath-filepath
-version:             0.10.1
+version:             0.10.2
 synopsis:            ByteString based filepath manipulation
 description:         ByteString based filepath manipulation, similar to 'filepath' package. This is POSIX only.
 -- bug-reports:
diff --git a/src/System/Posix/FilePath.hs b/src/System/Posix/FilePath.hs
--- a/src/System/Posix/FilePath.hs
+++ b/src/System/Posix/FilePath.hs
@@ -73,6 +73,7 @@
 , isAbsolute
 , isValid
 , makeValid
+, isSpecialDirectoryEntry
 , isFileName
 , hasParentDir
 , hiddenFile
@@ -722,6 +723,21 @@
 makeValid path
   | BS.null path = BS.singleton _underscore
   | otherwise    = BS.map (\x -> if x == _nul then _underscore else x) path
+
+
+-- | Is a FilePath valid, i.e. could you create a file like it?
+--
+-- >>> isSpecialDirectoryEntry "."
+-- True
+-- >>> isSpecialDirectoryEntry ".."
+-- True
+-- >>> isSpecialDirectoryEntry "/random_ path:*"
+-- False
+isSpecialDirectoryEntry :: RawFilePath -> Bool
+isSpecialDirectoryEntry filepath
+  | BS.pack [_period, _period] == filepath = True
+  | BS.pack [_period] == filepath          = True
+  | otherwise                              = False
 
 
 -- | Is the given path a valid filename? This includes