diff --git a/system-fileio/ChangeLog.md b/system-fileio/ChangeLog.md
index 161d3ee..5ec8e36 100644
--- a/system-fileio/ChangeLog.md
+++ b/system-fileio/ChangeLog.md
@@ -1,5 +1,12 @@
 # Changelog for system-fileio
 
+## 0.3.16.6
+
+* Fix building on Windows ([issue #31](https://github.com/fpco/haskell-filesystem/issues/31), regression in 0.3.16.5).
+* Tested with:
+  - Cabal and GHC 8.0 - 9.12.0 on Linux
+  - Stack and GHC 9.8.2 on Linux, macOS and Windows.
+
 ## 0.3.16.5
 
 * Fix building of the testsuite with `unix-2.8`.
diff --git a/system-fileio/lib/Filesystem.hs b/system-fileio/lib/Filesystem.hs
index 7afa165..550f1cb 100644
--- a/system-fileio/lib/Filesystem.hs
+++ b/system-fileio/lib/Filesystem.hs
@@ -710,20 +710,17 @@ getModified path = do
   info <- withHANDLE path Win32.getFileInformationByHandle
   let ftime = Win32.bhfiLastWriteTime info
   stime <- Win32.fileTimeToSystemTime ftime
-
-  let date = fromGregorian
-    (fromIntegral (Win32.wYear stime))
-    (fromIntegral (Win32.wMonth stime))
-    (fromIntegral (Win32.wDay stime))
-
-  let seconds = secondsToDiffTime $
-    (toInteger (Win32.wHour stime) * 3600) +
-    (toInteger (Win32.wMinute stime) * 60) +
-    (toInteger (Win32.wSecond stime))
-
-  let msecs = picosecondsToDiffTime $
-    (toInteger (Win32.wMilliseconds stime) * 1000000000)
-
+  let
+    date = fromGregorian
+      (fromIntegral (Win32.wYear stime))
+      (fromIntegral (Win32.wMonth stime))
+      (fromIntegral (Win32.wDay stime))
+    seconds = secondsToDiffTime $
+      (toInteger (Win32.wHour stime) * 3600) +
+      (toInteger (Win32.wMinute stime) * 60) +
+      (toInteger (Win32.wSecond stime))
+    msecs = picosecondsToDiffTime $
+      (toInteger (Win32.wMilliseconds stime) * 1000000000)
   return (UTCTime date (seconds + msecs))
 #else
   stat <- posixStat "getModified" path