diff --git a/System/Directory/AccessTime.hs b/System/Directory/AccessTime.hs
--- a/System/Directory/AccessTime.hs
+++ b/System/Directory/AccessTime.hs
@@ -45,7 +45,7 @@
 systemTimeToClockTime :: SYSTEMTIME -> ClockTime
 systemTimeToClockTime time = toClockTime $ CalendarTime {
     ctYear = fromIntegral (wYear time),
-    ctMonth = toEnum (fromIntegral (wMonth time)),
+    ctMonth = toEnum (fromIntegral (wMonth time) - 1),
     ctDay = fromIntegral (wDay time),
     ctHour = fromIntegral (wHour time),
     ctMin = fromIntegral (wMinute time),
diff --git a/access-time.cabal b/access-time.cabal
--- a/access-time.cabal
+++ b/access-time.cabal
@@ -1,5 +1,5 @@
 Name:                access-time
-Version:             0.1.0.1
+Version:             0.1.0.2
 Cabal-Version:       >= 1.6
 Category:            System
 Synopsis:            Cross-platform support for retrieving file access times